The plant looks like it's doing everything right. Big yellow flowers cover it, new ones opening every morning, the whole thing sprawling and green. Then the little fruits behind some of those flowers start to swell, reach maybe an inch or two (2 to 5cm), and go soft, yellowing at the tip before they drop. It leaves nothing to harvest – just a run of false starts.

That collapse almost always traces back to one thing – pollination that didn't take. The basics of how to grow zucchini get a plant to the flowering stage without much trouble, but flowers on their own don't make fruit. Pollen has to move from the male blooms to the female ones, and in a hot summer that hand-off often just doesn't happen. The good part is that it's an easy gap to close by hand.

Why the Baby Fruits Just Quit

A female zucchini flower comes with a tiny fruit already attached, sitting right behind the petals before it has even opened. That little fruit is basically on standby. If enough pollen reaches the flower while it's open, the fruit gets the signal to keep growing. If it doesn't, the plant cuts its losses – the fruit yellows, softens, and drops, since there's no sense pouring energy into something that won't hold seed.

Heat is where it usually goes wrong. Each zucchini flower gives you one morning, maybe, and then it closes for good – so the window was tight even before the weather got involved. Now push things past 90F (32C). The pollen starts to give out, losing the viability it needs to do anything, and the bees that would've been working the patch mostly clear off until the heat lets up. Fewer visits, weaker pollen, and a lot of those morning flowers close again having never really been pollinated.

Telling the Male Flowers From the Female

It's easy to see the difference between male and female squash blossoms, once you know the tell. Look at the stem right behind the flower. A male flower sits on a plain, slim stalk – nothing behind the petals but stem. A female flower has what looks like a miniature zucchini bulging at its base, right where the bloom meets the vine. That bulge is the unfertilized fruit, and it's the whole giveaway.

There's a timing quirk worth knowing, too. For the first week or two, a young plant will often put out male flowers and nothing else, no females anywhere, and every summer this sends somebody into a mild panic. Nothing's wrong. The males just show up first, getting the pollen ready for whenever the females decide to open. Once both are opening on the same morning, you're in business – that's when hand pollination actually does something.

Hand Pollinating, Step by Step

Hand pollinating squash and zucchini requires no special gear – just a minute of your time, and maybe a soft artist's brush from Amazon if you want it tidy. Morning is the time, before the heat climbs, while the flowers are actually open and the pollen hasn't dried out.

1. Start with a male flower that's wide open, the anther in the middle loaded up with pollen. Snap it off the plant, stem and all.
2. Now strip it down – pull the petals back and off, until what's left is basically a pollen-tipped wand on a stem.
3. Find a female that's open (baby fruit behind the petals, remember) and touch that anther to the middle of the flower, brushing it lightly over every side of the stigma. A couple seconds does it, with no need to be precious about it.
4. Move on. One male flower usually carries enough pollen for two or three females, so work down the row while you're out there.

No males open that morning? A soft brush or a cotton swab covers the same ground – swipe it around inside a male flower, then carry that pollen over to whatever females are open. Cotton swabs from Walmart are cheap enough to use once and toss.

Getting the Bees to Do It for You

Hand pollination is a stopgap, useful but not something anyone wants to do forever. Better to get the bees doing the work again. Flowers blooming near the zucchini pull double duty here – a bee already out working the yard for nectar will swing through the squash blossoms on its rounds. And it's the mix that matters, not the count. Different bloom shapes, different colors, and you pull in a wider range of insects than any single kind manages on its own.

Cut back on the broad-spectrum insecticides, too, or just skip spraying entirely while flowers are open and bees are on them – plenty of those products wipe out pollinators right alongside whatever pest you were chasing. Set out a shallow dish of water with a couple stones poking up for landing spots. Bees need to drink, and one that drinks in your garden tends to stay in it. None of this amounts to much alone. Together, it's the difference between attracting bees for steady fruit and standing out there every morning playing bee yourself.

Keeping It from Happening Again

When heat is the real problem with your zucchini, the fix is shielding the plants through the worst of it. In a stretch of extreme temperatures, a bit of afternoon shade takes the edge off enough to keep pollen viable and bees active into the morning. A length of shade cloth from Home Depot rigged over the bed during a heat wave handles that without much effort, and it comes right back off once the weather breaks.

Timing helps as well. A deep watering early in the day keeps plants from stacking drought stress on top of heat stress, and a plant that isn't struggling holds onto more of its flowers. Beyond that, watch the forecast – when a run of 95F (35C) days is coming, that's the week to be out there in the morning with a brush, instead of hoping the bees push through weather they'd usually sit out.

Have you ever wondered if there is a difference between squash vs. zucchini? It's tempting to define zucchini as having the classic cylindrical shape and green skin. Yet, there are varieties of yellow zucchini which look quite similar to straightneck squash. To add to the confusion, some cultivars of summer squash are long and green. Turns out, there is one feature that distinguishes summer squash from most zucchini.

Summer Squash vs. Zucchini: Similarities

Zucchini and most types of summer squash belong to the same species (Cucurbita pepo). In fact, zucchini is technically a type of summer squash. The other main types of summer squash include straightneck, crookneck, and pattypan varieties. These types are marketed with the squash name, as in straightneck squash, crookneck squash, etc.

On the other hand, the term “squash” is not always included when zucchini seeds, plants, or fruit are offered for sale in the United States. This is also true for recipes that call for zucchini. In conversation, most gardeners and cooks also refer to this veggie simply as zucchini.

The word zucchini has its origins from zucchina, which is the Italian word for squash. It's believed Italian immigrants brought zucchini to the U.S. in the 1920s and it seems the name stuck. Coincidentally, zucchini is called courgette in some countries, like England, and baby marrow in others.

Regardless of what it's called, zucchini has the same growing requirements as other types of summer squash. All require full sun and moist, well-draining soil. Most summer squash, including zucchini, have a bushy, short vined growth habit, and produce mature fruit in 40 to 50 days. All types of summer squash have tender skin and edible flowers.

Zucchini vs. Squash: Differences

If zucchini is simply a type of summer squash, why is there a distinction between yellow squash vs. zucchini with yellow skin. Are they the same thing? Turns out, there is a slight difference.

If you lay a yellow straightneck squash next to a yellow zucchini, you will see that the blossom end of the summer squash is more bulbous. Zucchini fruit has an even diameter from blossom end to the stem. This allows summer squash to have more seeds and these seeds will be more developed in the bulbous end as compared to a zucchini of the same size.

As for taste, both summer squash and zucchini have the same mild flavor. So, there you have it. The main difference between straightneck squash and zucchini is the shape. This is true whether you're comparing green squash vs. zucchini or yellow zucchini varieties to straightneck ones.

If you'd like to conduct your own comparative trials between cylindrical-shaped zucchini and straightneck squash, here are a few popular varieties to try in the garden:

Green Zucchini

• Black Beauty – A popular heirloom variety, Black Beauty has greenish black skin and the classic zucchini shape.
• Cocozelle – The white striping on the green fruit makes this Italian heirloom easier to spot in the garden. Cocozelle has a slightly nutty flavor.

Green Summer Squash

• Luciana – It's also easy to spot the gray flecked, light green skin of this hybrid. Luciana has a sweet, buttery flavor with nutty accents.
• Magda – Prized for its delicate flavor, this Mediterranean squash has a blocky shape and light green skin with white flecks.

Yellow Zucchini Varieties

• Burpee Butterstick – Along with the classic cylindrical zucchini shape, this hybrid produces lemon colored fruit that has a nutty, sweet flavor.
• Gold Rush – This high-yielding zucchini has a mild, sweet flavor and a brilliant yellow color.

Yellow Straightneck Squash

• Early Prolific – A popular heirloom variety, Early Prolific bears fruit with bright yellow skin and a buttery flavor.
• Enterprise – Adaptable to hot climates, this hybrid has creamy yellow skin and a savory, mild flavor.

When they are healthy and conditions are optimal, zucchini and other squash can produce heavily. But what happens when you have a zucchini or other squash growing into an odd shape? Pointy squash or other weird shaped zucchini may be the result of a number of issues, but often zucchini pollination problems are the culprit. Keep reading to learn about deformed squash and what you can do to prevent it.

What Causes Squash Deformities?

There are two basic reasons for deformed fruit: viral infection and pollination issues. Plants that are infected by viruses often produce smaller than average, misshapen fruit. Since viral diseases cannot be controlled with pesticides, the only option is to remove and destroy the infected plants to prevent any further spread.

If your squash is fruiting but the resulting fruit is deformed, the root cause often has to do with pollination. High temperatures combined with water stress or low nighttime temperatures typically affect pollination. Fruit may have pinched blossom ends or may be crooked, resulting in bottle necking or in fruit that has been pinched in.

Less commonly other stressors such as wind damage, root pruning during cultivation, or herbicide injury may result in odd looking fruit. Potassium deficiency may also result in a narrowing or pinching at the stem end.

Squash Pollination Problems

When temperatures are hot, squash along with other crops such as cucumbers may drop blossoms or set more male than female blooms, resulting in little to no fruit. If temperatures continue in the extreme and/or other stressors are present, the resulting fruit may be smaller than normal or deformed.

But the real problem is the bees. As temperatures soar, many bees abandon their pollinating duties. The ideal range for pollination for many bee species is between 60-90 F (16-32 C). Once temps exceed 90 F (32 C) the bees cease to or slow their pollinating efforts. This is most especially observed on vining crops like squash. If pollination does occur it may result in deformed fruit.

Zucchini Pollination

When pollination is inadequate, fruit develops unevenly. The walls of the ovary enlarge more next to fertilized seeds, resulting in weird looking zucchini or other squash. This may be due to extreme heat which in turn affects how bees pollinate.

All crops in the Cucurbitaceae family cross pollinate to produce fruit. This means they have separate male and female blooms on the same plant. Pollen is moved from male to female organs via bees and other pollinator insects. The pollen then fertilizes the ovules or seeds inside the ovary.

When pollination is accomplished, fruit results. If pollination is successful, the fruit enlarges and develops normally. When it is insufficient, fruit becomes deformed and twisted.

Besides the fact that successful pollination relies on both male and female flowers along with pollinators, another detriment is that the blooms are only open for a single day. This means the window for pollination is narrow and drought or water stress can severely affect the outcome.

What to do about Misshapen Zucchini

Both extreme heat and cool, wet weather can deter bee pollination. So too can pesticide application. Do not apply pesticides other than horticultural oil or insecticidal soaps during bloom time.

While there is little that can be done regarding the weather, gardeners can shield plants from the heat of the day and make sure to provide consistent irrigation.

Otherwise, while most zucchini require both male and female blossoms for a successful fruit set, parthenocarpic varieties may solve the problem of un-pollinated female blooms. Parthenocarpic species produce female blooms that do not need pollination for fruit sets, effectively eliminating the need for bee pollination and possibly resulting in fruit that is not marred.

Most vegetable gardeners are familiar with the problem. Zucchini plants that gift us too much fruit, and much of it is just huge. The big squash may be grated and frozen for cakes or breads, but who needs that much zucchini? Somewhere someone thought it would be a great idea to create a national Sneak Some Zucchini On Your Neighbor's Porch Day. That is certainly one way to get rid of extra squash, but beware of No Trespassing signs before you bestow the fruit. 

Too much zucchini is a common gardener's complaint. And harvesting zucchini too late creates another problem. Once they get big, the seeds are a problem and the flesh is not as sweet and tender. So if you are wondering what to do with a lot of zucchini, consider honoring August 8th, national Sneak Some Zucchini On Your Neighbor's Porch day. 

What to Do With a Lot of Zucchini

Zucchini is a prolific plant once it gets established. If there is a long growing season, gardeners can look forward to the fruits until the first frost. There are many recipes for zucchini, from stuffed to grilled, and encompassing foods like breads and muffins. But it is easy to tire of this food, which doesn't can well and is best fresh. One great way to save zucchini for things like bread is by grating and freezing it. The resulting product will need to be thawed and squeezed free of excess juice before using it in recipes. But if you don't want to fill your freezer, too much zucchini will have to be given away. 

The Origins of Zucchini Day

Zucchinis were probably first grown in Italy. The region has the perfect climate for this heat loving food. They have been traced to the early 1900s, but didn't make their way to the west until several decades later. They were initially cultivated in California but new varieties have allowed even northern gardeners to grow this fruitful plant. 

Zucchini enjoys popularity across the world, featuring in a wide range of cultural recipes. The guy who started National Sneak Some Zucchini On Your Neighbor's Porch Day was Thomas Roy. He is an actor who, with his wife, made up around 80 special days, including Dimpled Chad Day, and Eat What You Want Day. 

National Sneak Some Zucchini On Your Neighbor's Porch Day

It seems there is a national day for everything. Coffee, parents, doughnuts, you name it, there is a special day set aside. While many of these require a card to commemorate them, Sneak Some Zucchini day does not. All it requires is the permission of a neighbor to deposit extra squash on their porch. It is a good idea to make sure they want zucchini and have a use for it. You can help them out by tying a favorite recipe to the fruit.

If your neighbor isn't up to cooking with the food, you can always share the harvest by making them a batch of zucchini apple muffins, or zucchini chocolate chip bread. Zucchini is a perfect foil for baked goods and translates well in sweet dishes. If you have eaten and frozen as much of the squash as you can stomach, and your neighbors and family have been treated to their goodness, there is another way to get rid of excess harvest. Donate it to your food bank and give freshness back to your community. 

Zucchini has been a garden staple for centuries and has been cultivated since at least 5,500 B.C. If you’re a bit tired of the typical green zucchini, try growing golden zucchini plants. A twist on an old favorite with brilliant yellow color, the following article contains golden zucchini information, including how to grow golden zucchini and all about golden zucchini care.

Golden Zucchini Information

Zucchini is a rapidly growing, prolific producer. Golden zucchini plants are much the same. There is some confusion about yellow squash vs. golden zucchini. The two are not the same and yet are similar, being classified as summer squash. The major difference between the two is that golden zucchini has the classic elongated zucchini shape and yellow squash has a fat bottom and tapers towards the neck or even curves like a swan at the neck. Golden zucchini is an heirloom, open-pollinated, bush-type of zucchini. The foliage is said to be quite large, and coloration varies from medium green to yellow. The bushing quality of this squash means it needs plenty of space in the garden. The fruit of golden zucchini is medium in length and long and slender with brilliant, yellow color. The flavor is much the same as green zucchini, although some folks say it is sweeter. As with green zucchini, golden zucchini has a more delicate flavor and texture when picked small. As the fruit grows, the rind becomes tougher, and the seeds harden.

How to Grow a Golden Zucchini

Depending upon the variety, golden zucchini will be ready to harvest in 35 to 55 days from planting. As with other zucchini varieties, plant golden zucchini in full sun in well-draining, nutrient-rich soil. Prior to planting, work a few inches (8 cm.) of compost or other organic matter into the soil. If your soil does not drain well, consider growing golden zucchini in raised beds. Zucchini likes to start off in the area it will grow, but if you can’t wait for soil temperatures to warm to direct sow into the garden, start seeds indoors three to four weeks prior to the last frost. Be sure to harden off the seedlings for a week before transplanting them. If you are starting outside, be sure that soil temperatures have warmed, and the air is close to 70 degrees F. (21 C.). Resist the urge to plant too many zucchini seeds; one plant will produce 6 to 10 pounds (3-4.5 kg.) of fruit over the growing season. Space plants about 3 feet (just under a meter) apart to allow for space to grow, discourage disease, and allow for airflow. Usually, zucchini is started on a hill with three seeds per hill. As the seedlings grow and get their first leaf, snip off the two weakest, leaving one strong seedling per hill.

Golden Zucchini Care

Keep the soil consistently moist during the growing season. When the plants are very young, mulch around them to retain moisture and control weeds; as the plants grow, the large leaves will shade the soil and act as living mulch. Monitor the plants for pests. If early pests become a problem, cover the plants beneath a floating row cover. Drought-stressed plants are more susceptible to insect injury as well as some diseases. Zucchinis are heavy feeders. If the leaves become pale or seem weak, side-dress the plants with well-aged compost or use a foliar spray of kelp or liquid fish fertilizer. Harvest the fruit at any time, but smaller fruit tend to be most succulent and delicate. Cut the fruit from the plant. Ideally, you should use the squash within three to five days or store them in the refrigerator for up to two weeks.

If you’ve ever grown zucchini, then you know that it is a generally easy to grow, reliably prolific producer-- as long as you can keep pests away, of course. Early frosts can also dash your hopes for zucchini bread and other squash treats. In the following article, we’ll discuss how to protect zucchini squash, both by keeping pests off zucchini and frost protection of zucchini.

How to Protect Zucchini Squash from Frost

Some crops, like cabbage, peas, carrots, and parsnips, will tolerate a little frost, but zucchini is a warm season crop that can be injured by cold temps. If you are in a region where early frost is imminent, frost protection of zucchini is integral to its survival. It is important to ensure that you wait for all chances of frost to pass in your area before planting. That said, Mother Nature occasionally has other plans. When it comes to zucchini plant protection, you can cover the zucchini with straw, plastic, newspapers, or old sheets. The goal is to trap the heat from the soil into the air immediately surrounding the plants. In the morning, remove the covering so it won’t trap the sun’s heat and kill the plants. Keep in mind, however, that this will only work if you have a very short, very mild frost. Mature plants with fruit on the vines may need to be harvested immediately.

Protecting Zucchini Plants from Pests

You aren’t the only one that relishes the zucchini. Any number of critters are vying for their share of the spoils. The usual suspects are insect pests, of course, but birds and rodents will also gnaw at the fruit. Netting set over your squash crop will help deter squirrels and other rodents, but keeping the insect pests off zucchini requires a more cunning approach. Sure, there are always insecticides, but keep in mind that if you go that route, you are more than likely killing off the beneficial insects too. Beetles, aphids, borers, and caterpillars are all waiting with bated breath for you to turn your back on the squash vines, so it’s important to have a zucchini plant protection plan of attack. Squash bugs are one of the more damaging insect pests on all types of squash. As the adults and juveniles feed, they inject a toxin into the plant that causes it to wilt and die back. Look for the adults on the backside of the squash leaves, often accompanied by clusters of small, oval, orange eggs. Their offspring look quite different from the adults, more spider-like. Both the adult and nymphs can be hand-picked off the undersides of the squash leaves and drowned in a bucket of soapy water. The eggs can then be gently scratched off and disposed of in the same way. Squash vine borers are native to the eastern portion of the United States. The adults look like a wasp but are actually a type of moth. They hover around in the late spring to early summer looking for a likely squash upon which to deposit their eggs. The resulting offspring hatch within a few weeks. These caterpillars enter the stem of the squash and feed on it for four to six weeks until the plant dies. Again, these pests can be handpicked if they’re not too severely damaged. Slit the stem of the plant carefully and remove the grub by hand. If just the thought of hand-picking grosses you out, a better plan of attack is to thwart the adults. Use row covers, a non-woven fabric cover, to keep the adults from laying their eggs. They can be tacked down if you prefer or just draped over the plants where they can be easily removed for watering purposes. There are also other ways of protecting zucchini plants from insect marauders. Some folks place small strips or squares of aluminum foil around the base of the plants to repel squash bugs. Diatomaceous earth can also be used. It is made up of the skeletal remains of minuscule sea creatures and although it looks powdery, it will actually cut up the soft bodies of insects. Apparently, you can try luring squash bugs away with the color yellow, as these bugs supposedly have a penchant for the color and if you paint or place something yellow nearby (but not too near the vines), they will flock to the lure. Hanging yellow plastic tape or ribbon works well and is even better if you include some sacrificial squash plants under the ribbon. Another method of protection is companion planting. Interplant the squash with plants that these insects dislike such as catnip, dill, lavender, and marigold. If all else fails and you’ve just had it, the big guns can come out. I mean insecticides. For squash bugs, insecticides are only effective against the nymphs and should be sprayed immediately as soon as eggs are spotted on the leaves. Cover the backside of the leaves well with the spray and repeat every seven to ten days as long as eggs and nymphs can be found. For the control of squash vine borers, apply insecticide to the stems of squash plants near the base every seven days from late May through June. For both insects, synthetic pesticides include esfenvalerate, permethrin, bigenthrin, and Sevin controls just squash vine borers. For an organic approach, try applying neem oil. It does need to be applied more often (every 3-5 days) than the synthetic insecticides, but it is safer for our friends, the honeybees – and us. Note: Any recommendations pertaining to the use of chemicals are for informational purposes only. Specific brand names or commercial products or services do not imply endorsement. Chemical control should only be used as a last resort, as organic approaches are safer and more environmentally friendly.

Zucchini plants are one of the most prolific and easy crops to grow. They grow so rapidly they can almost overtake the garden with their rambling fruit-heavy vines and their large shading leaves. Fast and easy as they may be, even zucchinis have their problems. A common problem is yellowing zucchini leaves. Yellow leaves on zucchini, a condition also called chlorosis, is a symptom that may be caused by a number of things.

Help, My Zucchini has Yellow Leaves!

If you notice your zucchini leaves are turning yellow, it may not be too late to save the plants. The likely culprits are either insects or disease. The following article delves into some of the causes for zucchini plants developing yellow leaves and what you can do about it. But let’s first take a quick look at the squash itself and what kinds of growing conditions it prefers.

About Zucchini

Zucchini, or “courgette” in some countries, is a thin skinned summer squash variety of the Cucurbita pepo species. Zucchini fruit is generally a green oblong squash between 4-10 inches (10-25 cm), but it can also be picked when it’s smaller and cooked whole.

Zucchini squash comes in a range of shapes and may also be bright yellow in color. It grows from either vining or bush plants, and can be started by seed either indoors, or direct-sown when there is no longer any danger of frost. Plant zucchini in full sun, in well-draining fertile soil and keep the plants consistently watered. Plants should be spaced 3-4 feet (0.9-1.2 m) apart.

Why Are My Zucchini Leaves Turning Yellow?

While zucchini is quite easy to grow it may still present with some problems. Yellowing foliage on a zucchini may be the result of environmental factors, pests, disease, or even a genetic marker.

Sometimes yellowing zucchini leaves are a result of environmental factors including lack of sunlight, over- or underwatering, root damage, nutrient deficiencies, disease, or pests. The first consideration in solving the problem of yellowing zucchini leaves is whether the growing conditions are suitable.

Drought or Waterlogged Soil

Waterlogged or overly dry soils can cause a number of problems with zucchini. Both may lead to yellowing and wilting. Heavy soils that don’t drain readily become deprived of oxygen, which leads to wilting and yellowing foliage along with browning of leaves and stems. Prolonged periods of rain combined with heavy clay soil leads to a lack of drainage followed by the above signs of disease. The solution may be to plant your zucchini squash in raised beds where you have more control over the soil.

Fertilizer/Pesticide Burn

Using fertilizer and pesticides can cause yellowing squash foliage if they’re improperly used or overused. Fertilizer can result in leaf burn or scorch as well as wilting, margin yellowing, and stunting. This occurs most often when conditions are hot and dry, which concentrates fertilizer salts in the soil. Yellowing as a result of fertilizers can be mitigated by using a slow-release, organic fertilizer, like this Espoma 10-10-10 Garden Food from Amazon, or amending the soil with 1-2 inches (2.5-5 cm) of compost. If you’re using granular fertilizer, be sure to keep it off the leaves of the plant and water it in well immediately after application.

Pesticide burn or phytotoxicity causes a number of symptoms which may be confused with disease or pest damage. Pesticide burn occurs when stressed plants are sprayed with pesticides leaving them open to chemical damage. Pesticide damage occurs most often when weather conditions are extreme. Even the more benign insecticidal soaps and horticultural oils can damage zucchini plants in adverse weather.

Pests

Perhaps the most common culprit when it comes to yellow zucchini leaves is a wide range of pests which can all cause yellowing of foliage on squash. These include the squash bug, squash vine borer, spider mite, and aphid.

Cucumber Mosaic Virus

One of the more common zucchini diseases caused by the presence of insect pests is cucumber mosaic virus which, as its name suggests, also afflicts cucumbers, which are in the same family. The disease manifests as yellowing zucchini leaves, usually along the leaves’ veins. The culprit? Aphids feeding on the undersides of the plants leaves. Cucumber mosaic virus is transmitted by these tiny insects, resulting in stunted growth and poor fruit development. The bad news is that once the plant is infected, there is no cure.

You can try to halt the progression of the disease by removing and destroying any infected plant parts. However, ideally, you will be monitoring your plants for aphids before they become infected. Any sign of aphids should be treated immediately with an insecticidal soap or neem oil.

Spider Mites

Another insect pest, the spider mite, also sucks the sap from the leaves of the plant, resulting in the zucchini leaves turning yellow. Again, treat the plants with an insecticidal soap. Spray the entirety of all the leaves, including the undersides. Also, introduce or encourage beneficial insects like ladybugs and lacewings, who will feast on the spider mites (and aphids, too).

Fusarium Wilt

Another disease that will result in zucchini plants developing yellow leaves is Fusarium wilt. This fungal disease affects the plant’s vascular tissue. These spores live in the soil and can be carried by cucumber beetles that don’t really care that this is a zucchini and not a cucumber.

Unfortunately, once the plant is infected, fungicides are ineffective. It is best to remove and destroy the infected plants.

Other Issues

There are a number of diseases which may result in yellowing leaves on zucchini plants. Among them are the bacterial diseases of angular leaf spot and bacterial leaf spot, as well as fungal diseases like alternaria leaf spot, gummy stem blight, phytophthora crown rot, scab, and aster yellows.

With the exception of aster yellows which is actually caused by a phytoplasma, most of these diseases do not turn entire leaves or margins yellow but rather are multi-symptomatic.

How to Treat Yellow Zucchini Leaves

Because yellowing leaves may be the result of such a wide range of problems, it’s important to identify what’s causing the condition before attempting to treat the plants.

If the yellowing is determined to be too little irrigation, set up a regular schedule for watering early in the morning on a regular basis. Water deeply at the base of the plants and avoid getting water on the leaves.

If too much water is a problem, you can always plant in raised beds or amend the existing soil before next season's planting to make it well-draining.

Use water-soluble, organic, slow-release fertilizers when possible or follow the manufacturer’s instructions for use of granular fertilizer. Zucchini plants are heavy feeders, so any deficiencies in manganese, sulfur, or iron can cause yellowing in younger leaves, gradually progressing and affecting the more mature leaves. We recommend you test the soil before planting to identify any insufficient nutrients and test the pH level. Zucchini likes soil that is slightly acidic or neutral (pH of 6.5-7.0).

If you are using horticultural oils or insecticidal soaps to combat pest infestations, do not use them on overly hot, dry, windy days. Wait for a cooler, calm day to use any pesticide. Carefully read the manufacturer’s instructions before applying any pesticides. Check for any cautions regarding sensitive plants and only apply on a calm, dry, cool, day with temps below 85 F (29 C).

Preventing Yellowing Zucchini Leaves

Yellow leaves may simply be a sign of normal aging. This is called leaf senescence and it just means that the older leaves turn yellow as they age while the rest of the plant stays a healthy green. Clip these leaves from the plant with a sterile tool, like the Felco F6 Pruning Shears from Amazon.

It could also be genetic. The “B” gene causes leaves to yellow, and also causes the fruit stem to yellow rather than green up. This gene may also cause fruit to ripen earlier and increase the number of female flowers, but otherwise has no ill effect upon the zucchini plant.

The best idea for preventing yellow leaves on zucchini is to plant disease-resistant varieties and to properly prepare the planting bed. Prior to planting, amend the soil with compost and other organic matter. This will improve the overall soil structure. If the soil is dense or has heavy clay, add peat moss and compost to lighten the soil and improve drainage.

Note: Any recommendations pertaining to the use of chemicals are for informational purposes only. Chemical control should only be used as a last resort, as organic approaches are safer and more environmentally friendly.

Zucchini is a prolific, rapid growing vegetable that one minute will be a diminutive 3 inches (8 cm.) long and practically overnight becomes a foot and half (46 cm.) long monster. It’s not always easy to know when to harvest vegetables or even when to pick different types of squash. So when is zucchini ready to pick? Read on to find out all the dirt on how and when to harvest zucchini.

Zucchini Harvesting Basics

Zucchini is a summer squash, a member of the Cucurbita family amongst which melons, pumpkins, cucumbers, and gourds also reside. Zucchini dates back to 5500 B.C. and originated in the northern parts of South America. It was then “discovered” by European explorers and introduced into their countries of origin.

Zucchini grows on a bushy, non-vining plant with large, dark green leaves peppered with silvery grey streaks. These large leaves provide shade to the fruit, but also tend to play “hide n’ seek” with it. One minute you have tiny zucchini and seemingly in the next, gargantuan fruit. That’s why vigilant zucchini plant picking is so important. The mammoth fruit tends to become stringy on the inside with a tough exterior.

When picking zucchini plants, you want smaller, more tender fruits that are sweet and mild. The plants produce both male and female flowers, making it a perfect squash to grow for those with limited space, as the plant does not need another to set fruit.

Trust me, one healthy plant will produce more than enough fruit for most small families. In fact, harvesting and storing zucchini at the proper time and conditions will undoubtedly provide ample fruit for not only your family but your friends and extended family as well!

One gardener even created a holiday just to get rid of his excess zucchini harvest. Sneak Some Zucchini Onto Your Neighbor's Porch Day falls on August 8th each year, which gives you a clue about when it's time to harvest zucchini. Let's take a look at some other ways to tell when to harvest zucchini.

When to Harvest Zucchini

Ideally, zucchini squash harvesting will commence when you have fruit that is 6 to 8 inches (15-20 cm.) long. Some cultivars have fruit that is still edible at up to a foot (31 cm.) long.

That said, if you leave the fruit on too long, the seeds and rind harden, making it unpalatable. If you pick often, fruit production is hastened, which may or may not be a good thing. If you find that you and yours are drowning in more zucchini than can be reasonably used, leave a few fruit on the plant to slow down production.

Fruit should also be dark green (yellow or white depending upon the variety) and firm. If the fruit feels mushy, it’s probably rotting and should be discarded.

How to Harvest Zucchini

Don’t just pull the fruit from the plant when harvesting zucchini. You will likely damage the plant. Cut the fruit from the plant at the stem.

With its broad leaves, zucchini fruit can be difficult to spot, hence, giants are often found hiding where you had never noticed fruit before. Check under the leaves for hidden fruit. Be careful when you are hunting, lest you damage the fragile leaves and stems.

How to Store Zucchini

Now that you have harvested the fruit, how do you store it? Store unwashed zucchini in a perforated or open plastic bag for up to a week or freeze the fruit for use later down the road. There are a couple of ways to do this.

I shred unpeeled zucchini, drain it in a colander, and then squeeze it gently to remove excess moisture. Place it in sealed quart size freezer bags and freeze them flat so they can be stacked in the freezer. I shred it because the end result will likely be zucchini bread or fried zucchini cakes.

You can also wash the fruit, dry it, and cut it into one inch (2.5 cm.) cubes and then freeze it in freezer bags. Either way, frozen zucchini lasts up to three months.

Zucchini is one of the most popular summer squash varieties to grow in the vegetable garden, although they are technically a fruit, because they are easy to grow, prolific producers. One source states that the average plant produces between 3 and 9 pounds (1-4 kg.) of fruit. My plants often exceed this number. To get the highest yield of fruit, you may question “should I fertilize zucchini?” The following article contains information on fertilizing zucchini plants and zucchini fertilizer requirements.

Should I Fertilize Zucchini?

As with any fruiting plant, zucchini can benefit from additional feedings. How much and when to apply zucchini plant fertilizer will depend on how well the soil was prepared prior to sowing or transplanting. For optimal production, zucchini should be started in rich, well-draining soil in an area of full sun. Summer squashes are heavy feeders, but if you are lucky enough to have nutrient rich soil, you may not need any additional feeding of zucchini plants. If you are interested in feeding zucchini plants organically, the time to start is prior to sowing seed or transplanting. First, select your site and dig up the soil. Dig in about 4 inches (10 cm.) of well composted organic matter. Apply an additional 4 to 6 cups (1 L.) of all-purpose organic fertilizer per 100 square feet (9.29 sq. m.). If your compost or manure is high in soluble salts, you will need to wait three to four weeks before planting the zucchini to prevent salt injury. Plant the seeds at a depth of one inch (2.5 cm.) or transplant starter plants. Water the plants once a week to keep them moist, 1 to 2 inches (2.5-5 cm.) per week depending upon weather conditions. Thereafter, apply organic zucchini plant fertilizer when plants just begin to bloom. You can use an all-purpose organic fertilizer or diluted fish emulsion when fertilizing zucchini plants at this time. Water in the fertilizer around the plants and allow it to soak down into the root system.

Zucchini Fertilizer Requirements

An ideal zucchini plant fertilizer will certainly contain nitrogen. An all-purpose food like 10-10-10 is generally sufficient for zucchini plant needs. They contain plenty of nitrogen to facilitate healthy growth as well as necessary potassium and phosphorus to boost fruit production. You may use a water soluble or granule fertilizer. If using a water-soluble fertilizer, dilute it with water according to the manufacturer’s instructions. For granular fertilizers, scatter the granules around the plants at the rate of 1 ½ pounds per 100 square feet (1 kq. per 9.29 sq. m.). Don’t let the granules touch the plants, as it may burn them. Water the granules in well. As mentioned above, if you have rich soil, you may not need additional fertilizer, but for the rest of us, pre-preparing the bed with compost will limit the amount of additional feeding needed. Then when seedlings emerge, a light dose of general all-purpose fertilizer is ample and then again once the blossoms have appeared.

One of the most prolific veggies is the zucchini. Just thinking of all the stuffed squash, zucchini bread, and fresh or cooked applications for the green, glorious fruits of this plant has my mouth salivating. Sadly, there are a few zucchini plant diseases that you need to watch for in order to reap that bountiful harvest. Treating zucchini diseases often starts with soil preparation, crop rotation, and a little pre-planning to minimize any potential issues.

Diseases of Zucchini Plants

Zucchini plants are one of the easiest vegetables to grow. Provided with full sun, well-drained soil with plenty of organic matter worked into it, and water, courgettes will faithfully produce fruit all summer long. In fact, you may be giving it to friends and neighbors because the plant produces more than you can eat. The only things that can diminish this rampant growth are zucchini problems like insects and disease. Zucchini plant diseases usually stem from an insect vector or fungal issues. Control of insect pests and cultural care are often the key to nipping zucchini squash diseases in the bud.

Fungal diseases

Squash leaves are notoriously sensitive to powdery mildew. This is one of the most common issues with zucchini and arises when leaves get moisture on them in warm weather, which doesn't dry off in a timely manner. This moist, warm environment allows the powdery mildew to flourish. Other common fungal diseases that affect zucchini include:

• Downy mildew is a fungal foliar disease that creates yellow spots on leaves.
• Leaf spot Septoria, which may overwinter in yard debris.
• Gummy stem blight and black rot are self-explanatory regarding their symptoms.
• Choanephora fruit rot grows on blossoms and developing fruit, destroying their edibility.
• Fusarium is a fungal disease that can attack many types of plants. Zucchini plants will wilt and die as the disease attacks the root system.
• Anthracnose also attacks many types of plants and spreads quickly in high humidity.

Many other fungi live in soil and persist for years, blossoming and infecting plants when conditions are optimum.

Viral diseases

Viral zucchini squash diseases are often transmitted to the plant from an insect when it feeds. The usual culprits are mites, aphids, scale, and thrips.

• Yellowed leaves may be a sign of a disease transmitted by aphids called cucurbit aphid-borne yellows luteovirus.
• Cucurbit yellow stunting disorder stems from a species of whitefly and produces yellow spots and reduced flavor on fruit.
• Squash mosaic virus comes from cucumber beetles and causes distorted, brittle leaves and warped unappetizing fruits. Zucchini mosaic virus is introduced by aphid feeding.
• Bacterial wilt is also introduced from cucumber beetles. Leaves yellow and the virus clogs the vascular system of the plant.

As with fungal diseases, viral diseases are also harbored in the soil and the pests that introduce them live in the dropped leaf and plant debris in the soil.

Treating Zucchini Diseases

To avoid many zucchini issues, practice crop rotation and clean up the previous year's debris, which may harbor disease and pests that transmit disease. Prevent insects that introduce viruses during feeding with insecticidal soaps or quick blasts of water. Remove the leaves that are infected with powdery mildew and other fungal diseases to prevent spread. Do not compost these, as some fungal diseases will persist. Choose disease resistant varieties of zucchini. Use copper dust or spray every ten days to keep many fungal diseases in check. Avoid watering the leaves of zucchini from above. This keeps leaves wet and allows fungal spores to bloom. Drip irrigation is more useful for target watering and to keep leaves in good condition.

Zucchini companion planting can help prevent pests and even boost your harvest. How, you ask? First you have to understand what companion planting is and what it can do. Companion planting involves planting in carefully planned combinations that support diversity, take advantage of available garden space, and provide benefits such as improved pest control and enhanced plant growth. Gardeners can use companion planting to grow many vegetables, including zucchini. Here we'll discuss which plants grow best with zucchini and why.

Best Companion Plants for Zucchini

Here are some good companion plants for zucchini to add to your garden:

Radishes – Often considered the workhorse of the garden, radishes are small plants that are easily planted amid zucchini plants. These companion plants for summer squash and zucchini help repel common zucchini pests such as aphids, squash bugs, cucumber beetles, and others. Radishes are good to eat, but they’ll help your zucchini more effectively if you allow a few plants to bloom and go to seed.

Garlic – A few garlic plants tucked among zucchini can help keep aphids and other pests in check.

Beans and peas – Zucchini plants are heavy feeders and legumes are beneficial because the roots fix nitrogen in the soil. Although any type of legumes will work, pole beans can be conveniently trained to grow up a trellis, thus saving precious garden space.

Nasturtiums and marigolds – Easy-to-grow annuals, nasturtiums and marigolds provide color and beauty to the garden, but that’s not all. Nasturtiums attract pests such as aphids and flea beetles, which means the pests are more likely to leave your zucchini alone. Try planting nasturtium seeds around the circumference of your zucchini patch. Marigolds planted near zucchini exude an aroma that pests don’t like and may be useful for discouraging nematodes. Both blooming plants attract bees, which zucchini plants require for pollination.

Herbs – Various herbs are useful for companion planting with zucchini. For example, the following herbs can help keep pests at bay:

• Peppermint
• Dill
• Oregano
• Catnip
• Lemon balm
• Marjoram
• Mint
• Parsley

Blooming herbs such as borage, which attract bees, are also great for pollinating zucchini blooms.

If you have ever container grown tomatoes, as I did this summer, you may be familiar with blossom end rot. While tomatoes are prone to blossom end rot, many types of squash are also susceptible, specifically to blossom end rot on zucchini squash. What causes zucchini blossom end rot and is there a zucchini blossom end rot treatment?

What Causes Blossom End Rot on Zucchini Squash?

Blossom end rot on squash manifests itself at the onset as a small bruise on the blossom end of the fruit, gradually softening and darkening in color until it eventually rots. Blossom end rot is a calcium deficiency that is recognized by the secondary issue of the dark rotting area caused by a fungus. This lack of calcium in the soil is brought about by a number of factors including extreme soil moisture fluxes, over-fertilization, or root damage usually caused by cultivation. In the case of root damage, the feeder roots may have been damaged by hoeing. Plants that bear heavily are also more likely to get blossom end rot since they have a greater need for additional calcium. Calcium is necessary for the growth process as it engenders healthy cell wall growth. Once the plant has taken up the calcium, it no longer moves from the part of the plant it has been taken to; therefore, it needs a continuous supply of calcium throughout the growing, flowering and producing season.

Preventing Blossom End Rot on Zucchinis

Preventing blossom end rot on zucchinis would be preferable to trying to treat them once they are already afflicted. Test your soil prior to planting to see if it has adequate levels of calcium. The local extension office can help with soil tests.

Also, maintain consistent irrigation and keep the soil evenly moist. Setting up an irrigation system, like the Rain Bird LNDDRIPKIT Drip Irrigation Landscape/Garden Watering Kit from Amazon, could help with this. Mulch the plants to aid in water retention with organic mulch, like straw, or inorganic mulch, like black plastic.

Use care when cultivating around the zucchini as well as tomatoes, peppers, and eggplants so you don’t sever the feeder roots which will make the plants think they are under moisture stress and trigger blossom end rot.

Zucchini plants do not need high amounts of nitrogen, which can result in lush, healthy foliage and little to no fruit. Excess nitrogen also causes blossom end rot on zucchini squash, as it blocks the absorption of calcium. Avoid high nitrogen fertilizers and ammonia fertilizers (such as fresh manure) that will stimulate foliage growth, add more salt to the soil and block the absorption of calcium. This is especially true for zucchini, or any cucurbit, grown in containers. They need a fertilizer containing micronutrients, including calcium.

Zucchini Blossom End Rot Treatment

If the plant already shows signs of end rot in the early fruiting phase, you can probably “fix” it by following the above advice along with the addition of calcium in the soil. Calcium is not taken in well by the foliage, so avoid a foliar spray. Calcium needs to go directly to the roots. Calcium carbonate tablets, like these Major Regular Strength Antacid Tablets from Amazon, or anti-acid tablets like Tums, can be inserted at the base of the plant. They will then dissolve and within a few hours, calcium will be available to the plant. You can also run calcium through a drip system. Use either calcium chloride or calcium nitrate. This procedure is optimal when the weather is warm and dry.

With lovely summer conditions, the plant goes into growing overdrive, using the available calcium at such a rapid rate that the soil is stripped. Feeding through a drip system will give a continuous supply of calcium during the peak growing spurts as well as providing steady irrigation to avoid water stress which is connected to blossom end rot.

If you have ever grown zucchini, you know it can take over a garden. Its vining habit combined with heavy fruit also lends it a tendency towards zucchini plants that lean. So, what can you do about floppy zucchini plants? Read on to learn more.

Help, My Zucchini Plants are Falling Over!

First of all, don’t panic. Many of us who have grown zucchini have experienced the exact same thing. Sometimes zucchini plants fall over from the outset. For example, if you start your seeds indoors when there isn’t a sufficient light source, the little seedlings tend to stretch to reach the light and will often topple over. In this instance, you can try to mound soil around the base of the seedlings to give them extra support. If you are well past the seedling stage and have adult zucchini plants falling over, it’s never too late to try to stake them. You can use garden stakes or anything lying around, along with some twine, horticultural tape, or old pantyhose; use your imagination. At this time, you can also remove any leaves below the fruit which will help identify ready fruit before it becomes zucchini-zilla. Some people also mound dirt around them if their zucchini plant falls over. This may be a good thing and allows the plant to sprout more roots, giving it more support. If you have actual floppy zucchini plants, they might just need some water. Cucurbits, of which zucchini are members, have deep roots, so water slowly with one inch (2.5 cm.) of water per week and allow it to soak down 6 to 8 inches (15-20 cm.) deep. At any rate, take this as a gardening learning lesson. Plus, if you go ahead and stake or cage them before they get too large next year, I don’t see leaning zucchini plants in your future because you will be ready.

The amazing bounty of zucchini is undoubtedly one of the season’s greatest pleasures. These squash are one of the most prolific producers and zucchini growing problems are rare. They are, however, prey to numerous insect pests whose feeding activity can seriously damage the crop. Zucchini pests range from the tiny aphid to the ½ inch (1 cm.) squash bug, but the damage to the plants can often result in death. Early detection to find zucchini bugs on plants is crucial, as some of these pests can kill the vines in just a few days.

Zucchini Growing Problems

Most gardeners have a good laugh at the size some of their zucchini fruit attain. It stops being so funny when the fruit is taking over your garden and you can’t seem to give the stuff away quick enough. That type of exuberant growth should be celebrated and lauded, and it would be sad if anything happened to stop the consistent march of produce. Unfortunately, some insects do plague the plant and jeopardize the harvest. Identification is important as each pest has a different treatment. For instance, you can’t just say the plant has zucchini worms when it is more likely some species of larva or caterpillar. Here are just a few of the most common zucchini bugs on plants.

Vine borers and worm-like zucchini pests

Zucchini plants that look limp are often falling victim to any number of fungal diseases. They can also be experiencing the bite of the squash borer. Squash borers are hard to see because the hatched caterpillar crawls inside the zucchini stem. These hidden zucchini worms feed on the stem for up to six weeks before pupating and finally becoming adults. Adults are a type of moth but more closely resemble a wasp. In addition to wilting plants, look for tiny holes in the stems and sticky black excrement. Early treatment as adults are laying eggs is the best way to control borers. Use neem oil every three to five days at the base of the plant from May through June. Other worm-like pests of zucchini include:

• Armyworms
• Cabbage loopers
• Cutworms
• Leaf miner larvae

Other Zucchini Insects

• Aphids are one of the most common of the pests that affect zucchini plants. They are small, winged insects that tend to mass together and leave sticky honeydew on leaves. Often ants are seen in tandem with aphids because ants feed on the honeydew. Zucchini aphids aren’t the only pest in town though.
• Thrips are another miniscule insect that you might need a magnifying lens to view. Thrip damage occurs from adult and nymph stages and their feeding can transmit tomato spot virus.
• Flea beetles are tiny dark brown insects which jump when disturbed. In large infestations, the leaves will have shot holes through out. Heavy populations of flea beetles can diminish plant health or kill it.
• Cucumber beetles are actually quite pretty but their damage can be serious. These insects are ¼ to ½ inch (6 mm. to 1 cm.) long, bright yellow with black spots. Leaves, stems, and fruit will become scarred and damaged from cucumber beetle's feeding.
• Squash bugs are another common pest of zucchini. Nymphs are greenish gray and adults are brownish gray. Female squash bugs lay copious quantities of bronze-colored eggs on the underside of leaves. Feeding causes speckled yellowish brown leaves, wilting, stunted runners, distorted or dead fruit.
• Stink bugs are similar in form but smaller and cause pinpricks on fruit with yellow halos. These areas of damage caused by stink bugs become necrotic and mushy.

Most of these insects can be controlled by using row covers, practicing good weed management, and using appropriate insecticides or horticultural oils and soaps for chemical free controls.

Love zucchini but not sure you have enough space? It’s a legitimate concern. Zucchinis are famous spreaders, and can easily take up 9 square feet of garden space.

The solution? Growing zucchini in containers! Especially if you choose the right variety and throw in some vertical support, you can have a high-yielding zucchini plant on your small balcony or patio.

This article will cover how to grow zucchini plants in containers, from picking the right cultivar to making sure your planter is actually big enough. Let’s go!

Container Zucchini Varieties

There are two major varieties of zucchini plants: vining ones and bush ones. If you’re short on space, you want to go with a bush (also called compact) variety. Some popular choices are “Fordhook” and “Eightball.” (Both from Burpee Seeds).

If you’re growing one zucchini plant in an area bees aren’t likely to visit (on a high balcony or in the middle of a city), it’s a good idea to get a parthenocarpic plant. Parthenocarpic plants can produce fruit without pollination. Burpee's “Sure Thing” is a great one.

The Best Containers for Zucchini

Just because we’re growing compact doesn’t mean we’re growing small. When you’re picking a pot for a zucchini, bigger is always better. At a bare minimum, you should get your hands on a 5 gallon container like this one from Amazon. (Keep in mind that a 5 gallon planter is actually much smaller than a 5 gallon bucket, like the orange ones from Home Depot).

If it’s at all possible to get a bigger container, though, it’s worth it. The extra space will make for happier plants and more fruit. These 25 gallon fabric grow bags from Amazon are a great deal. You can buy hard plastic containers that are 25 gallons (here they are on Amazon), but they are way more expensive. With pots this size, fabric is the way to go.

Zucchini roots are prone to rot if the bottom of the pot stays soggy. Drill extra holes in the bottom of your pot if necessary.

Filling the Container

Zucchini grown in containers requires a lightweight, well-drained potting soil such as a commercial mix containing ingredients like peat, compost, and/or fine bark, along with either perlite or vermiculite. Avoid regular garden soil, which probably contains pests and weed seeds, and quickly becomes compacted enough to smother the roots.

Growing Vertically

Even though we’re not planting vining zucchini, it’s still a good idea to have some vertical supports. This is because zucchini leaves and fruits get big and heavy, and if they’re left to dangle over the edge of the container, they could snap off under their own weight. Try using a modular tomato cage like this one from Amazon. You can build it to fit the size and shape of your container and plant.

How to Grow Zucchini in a Pot

1. Wait until about two weeks after the last frost in your area.
2. Plant two or three seeds in the center, at a planting depth of about an inch (2.5 cm).
3. Allow a couple of inches (5 cm) of space between each seed.
4. Water the soil lightly and keep it slightly moist but not soggy until the seeds germinate in a week or two.
5. If all of the seeds sprout, thin seedlings after about two weeks. Remove the weakest and leave a single, strong seedling.

Zucchini Container Care

Once the seeds sprout, water deeply whenever the top 2 inches (5 cm) of soil feels dry to the touch, then allow the top of the soil to dry before watering again. Zucchini is a sun-loving plant that needs an absolute minimum of six to eight hours of sunlight per day, and eight to ten hours is even better.

Feed the zucchini plants every four weeks, using a balanced, water-soluble fertilizer. Alternatively, mix a time-release fertilizer into the potting mix at planting time.

Summer wouldn't be complete without the traditional bumper crop of summer squash, such as zucchini. The Black Beauty zucchini plant is a heavy producer with glossy, firm young fruit. Summer squash plants have been cultivated in Mexico and South America since 5500 BC. They are related to wild gourds and wild forms of summer squash flourish in semi desert regions of Latin countries as well as the American southwest.

History of Black Beauty Zucchini

The Black Beauty zucchini plant was introduced in 1957 as one of the earliest and most productive of the darker skinned zucchinis. The fruit has deep blackish green skin, firm and straight fruits - which are at their peak when less than 6 inches tall. However, we know what really happens when somehow one or two hide among the leaves until one day you discover a monster of a fruit. And I mean monster. I have pulled out zucchini that are as long as my calf and about as big around. I am philosophical about these huge vegetables. If they occur, I count it my duty to make several batches of chocolate chip zucchini bread. Yum! There are several categories of summer squash. Black beauty belongs to the zucchinis, which gets its name from the Italian "zucca," their name for squash. Summer squash are classified by their shape. Zucchini fruits have straight lines, are uniformly cylindrical and have smooth green skin. Some zucchinis have light green, yellow or even variegated skin. Black beauty is such a deep green as to almost seem black. It has a classic summer squash profile and uses that range from baking, pickling, sautéing or even fresh. Other summer squash to try are the crooknecks, scallop, straightneck, cocozelle and marrow.

Growing Black Beauty Zucchinis

Zucchinis (Cucurbita pepo) practically grow themselves and are useful in many recipes and preparations. Try growing Black Beauty zucchinis for their intense color and prolific production. This variety of summer squash takes 45 to 65 days to harvest. Once the plant starts producing fruit, they will appear regularly all season long, until cold temperatures kill the plant. Sow the seeds outside 2 to 4 weeks after the date of the last frost in a sunny location on hills of prepared soil. Germination is usually in 5 to 10 days with average moisture and soil temperatures of at least 60 degrees Fahrenheit (15 C). Plant 2 to 3 seeds per mound. The history of Black Beauty zucchini indicates they were developed for the compact bush and heavy production. You won't be disappointed with the heavily bearing plant and the flavorful attractive fruit.

Zucchini plants are both beloved and loathed by gardeners everywhere, and often at the same time. These summer squashes are great for tight spaces because they produce abundantly, but it's that abundant production that earns them such ire. Unfortunately for some growers, zucchini squash problems, like hollowed out zucchini, can make a bountiful harvest hard to give away to hapless passers-by. When your zucchini fruit is hollow, they're weird looking but safe to eat (although hollow fruits may be hard to get rid of). Read on to learn how to avoid this problem in the future.

What Causes Hollow Zucchini?

The fruit of the zucchini is an overgrown, fleshy ovary designed to protect the seeds and encourage animals to carry them far and wide. When zucchinis are hollow, it's usually because the seeds didn't get properly pollinated or aborted soon after the fruits began to form. There are a number of environmental causes for hollow zucchini squash, many which are easily correctable. As long as you catch the problem while some flowers are still on the vine, you should get some normal fruit during the growing season. Early fruits are frequently troubled with hollowed out centers, since conditions may not be right for pollination even though flowers are present. Lots of wet weather discourages pollinators and hot, dry conditions cause pollen to dry out and die. You can help by increasing watering to raise humidity around the plant, then hand pollinating flowers. Another common cause of hollowed fruits is irregular watering. Fruits with proper pollination may still experience some hollowing in the center if water has been erratic, causing some parts of the fruit to grow faster than others-- effectively tearing the center tissues apart. If your squash plants aren't mulched, you may want to consider adding 2 to 4 inches (5-10 cm.) around the plant and across the root zone to help hold water. Watering on a schedule might not hurt either. A less common cause of hollow zucchini is a lack of environmental boron. Boron is an immobile nutrient in plants, which means that it's hard to move around once inside the tissues. It helps plants build cell walls, and in areas of rapid development, like growing fruits, it's crucial to proper growth. Without a continuous supply of boron, plants are unable to provide these quickly expanding areas with the building blocks they need, resulting in aborted seeds. Before adding boron, perform a soil test to ensure that your plant needs this micronutrient, then add borax, solubor, or a soluble trace element mix according to package directions.

Those big, beautiful leaves of zucchini plants protect their bounty of fruit from the elements, allowing for what seems like a never-ending supply of straight, smooth-skinned zucchinis. For most gardeners, the question of how to get rid of so many fruits is foremost in their minds, but when a gardener has bumpy zucchini fruit, disposing of excess fruit becomes a secondary issue to correcting the deformed zucchinis. Let's learn more about what to do for bumpy zucchini fruit.

Bumps on Zucchini

Although there may be an open-pollinated zucchini variety with bumpy skin, bumps on zucchini are not typical. Usually, bumps are considered a sign of one of the more serious zucchini problems, caused by one of many incurable plant viruses. Cucumber mosaic virus, watermelon mosaic virus, papaya ringspot virus, squash mosaic virus, and zucchini yellow mosaic virus can all cause these bumpy, deformed fruits. Symptoms of the many viruses in zucchini may bear close resemblance to one another, with common symptoms like scattered yellow patches on young or maturing leaves, leaf deformation, and irregular bumps or yellow spots on zucchini fruits. Stunting of plants often occurs, especially if the zucchini plant contracted the virus early in life or the seed itself was infected. A less common cause can be due to rapid growth or an excess of calcium in the soil.

Preventing Viral Related Zucchini Problems

There is no way to treat zucchinis once they're infected with viruses, but there are many preventative measures you can take at planting time, especially if you have lost crops to viruses before. Many viral pathogens are transmitted by sucking insects, like cucumber beetles or aphids, but they can also spread through infected seeds that mature into infected plants. Do not save zucchini seeds if there's any question as to the viral status of the mother plant. Instead, order certified virus-free seeds from a reputable supplier. If you direct seed your zucchinis, take some extra time to lay down reflective mulch and row covers to protect your zucchinis from virus-vectoring sucking pests. Transplants raised in a greenhouse need to be carefully monitored for insect pests. You can slow the spread of zucchini viruses in your garden by keeping the grass and weeds in your yard closely trimmed, since weedy and overgrown areas are very attractive to the bugs. When viral infections become obvious, remove the infected plants immediately to reduce the chance of spreading disease further. Always work with disease-free plants before moving to the diseased ones, as some plant viruses can be passed on dirty tools or clothing, especially when grafting or pruning zucchinis.

Growing zucchini has a reputation for being easy and, honestly, that’s pretty fair. Cucurbita pepo germinates fast, takes off quickly, and one plant can produce more fruit than most households know what to do with. Getting zucchini to grow isn’t the hard part. Staying ahead of the harvest and knowing which problems are worth worrying about are the real challenges.

Whether this is your first season growing a vegetable garden or just your first time growing zucchini, the rules are pretty much the same as with any warm-season crop. Wait for the soil to warm up, don’t skimp on feeding, and keep up with the harvest.

But even easy-to-grow vegetables still have specific requirements you must meet, if you want them to thrive and produce lots of edible fruit. I’ll walk you through exactly what you need to know in order to grow a huge harvest of delicious zucchini this summer.

Quick Zucchini Facts

Planting

Whether you start seeds indoors or direct sow zucchini seeds in the garden, there are some basic guidelines to follow to give plants a strong start.

Soil Requirements

Zucchini is a heavy feeder, so you need to ensure your soil has enough nutrients to feed your plants. Work 2 to 3 inches (5-7cm) of compost into the bed before sowing. This improves drainage and soil nutrition without much fuss.

A soil pH anywhere from 6.0 to 7.0 is fine for zucchini. If soil drainage is slow, mounded hills that are 6 to 12 inches (15-31cm) high can help a lot. Hilled soil warms up faster in spring too, which helps plants get an earlier start.

Light Requirements

Six hours of sun is the minimum light requirement for zucchini, but eight hours of full sun is better for lots of fruit production.

Wind shelter matters, too. Zucchini needs pollinators to work between the male and female flowers, so a spot that’s consistently windy makes pollination tougher for beneficial insects. Missed pollination is usually the cause of poor fruit set.

Planting Step-by-Step

Direct sowing after the last frost date is the standard approach. Zucchini germinates fast in warm soil, usually within 5 to 7 days once soil is at least 60°F (15°C).

• If starting seeds indoors, begin them 4 to 6 weeks before your last frost date.
• For hill planting: Create mounds of soil 6 to 12 inches (15-31 cm) high and 12 to 24 inches (31-61 cm) across. Plant 4 to 5 seeds per hill, 1 inch (2.5 cm) deep. Once the first true leaves appear, thin to the strongest two or three plants per hill.
• For row planting: Space individual plants 2 to 3 feet (0.6-0.9 m) apart within the row, with rows spaced 3 to 4 feet (0.9-1.2 m) apart.
• After seedlings are established and actively growing, apply a layer of mulch around the base of the plants to retain moisture and suppress weeds, then water well.

Zucchini Care

After planting, follow these care tips to ensure your zucchini plants thrive and produce lots of delicious squash to eat.

Watering

About 2 inches (5 cm) of water per week is the target, when it comes to watering zucchini plants. Base watering is better than overhead watering as wet foliage and powdery mildew tend to go together. By late in the season this problem shows up in almost every garden regardless.

A soaker hose or drip line like these from Amazon makes watering plants at the roots simple and helps prevent powdery mildew. The best time to water plants is the morning, especially if overhead watering is unavoidable. Then leaves at least have time to dry before dark.

Once the plant is fruiting, swings matter more than total amount. Going dry then soaking hard is what leads to blossom end rot and misshapen zucchini.

Fertilizing

Before planting, amend soil with compost or a slow-release granular fertilizer. Then six weeks after planting, sidedress zucchini plants with balanced fertilizer like this from Amazon.

Once flowers appear, back off the nitrogen. Fertilizing zucchini plants with more phosphorus and potassium at this stage will help them produce more fruit and less leaves, which is what you want.

Pale or weak-looking foliage is usually a sign your plants need more nutrients. A fish emulsion like this from Amazon or a kelp spray gives plants a quick boost and won’t burn roots.

Mulching

A 2 to 3 inch (5-7 cm) layer of mulch helps zucchini plants thrive. It retains moisture, keeps soil temperatures consistent, and prevents soil splash that spreads disease onto the lower leaves.

Use straw, shredded leaves, or wood chips – it doesn’t matter much what type of mulch you choose. Just keep mulch back an inch or two (2.5-5 cm) from the stem to prevent rotting.

Pruning

Pull off older lower leaves as the season goes, especially anything that’s already showing signs of powdery mildew. Pruning zucchini plants opens up airflow at the base and slows disease spread.

Cut flush to the main stem and don’t leave stubs. Hollow stubs are basically an invitation for pests. A few minutes of pruning every week or so makes a real difference late in the season. Use a pair of sharp, clean pruners, like these pro-approved shears from Felco.

Staking is optional, but worth considering in tight spots. It helps fruit stay off the ground, makes harvesting easier, and there’s less chance of fruit rotting.

Care Calendar

Harvesting

Waiting too long to harvest zucchini is the most common mistake people make. At 6 to 8 inches (15-20 cm) long the fruit is at its best. The skin is still tender, seeds are soft, and the flavor is fresh.

Leave it past that and the skin toughens, seeds harden, and the taste just isn’t as good. In peak summer heat, something that looked harvest-ready in the morning can be a foot (30 cm) long by evening. Daily checks are a must as fruit begins to ripen.

Picking regularly tells the plant to keep producing and an oversized fruit sitting on the vine slows down production. If one giant zuke is hidden under the leaves, and it likely will be, harvest it to let more fruit develop.

To harvest zucchini, cut off the fruit rather than pull it and leave about an inch (2.5 cm) of stem on your harvested zuke.

Varieties

There are tons of tasty zucchini varieties available as both seeds and starts from a variety of vendors. Here are a few standout types of squash to try.

• ‘Black Beauty’ is a classic dark green cultivar and one of my favorites to grow. It’s reliable, productive, and easy to find. You can get Black Beauty seeds from Burpee.
• ‘Costata Romanesco’ is an Italian heirloom with ribbed skin and better flavor than most modern varieties. It’s worth growing at least once. Get Costata Romanesco seeds from Botanical Interests.
• ‘Gold Rush’ is bright yellow and easier to spot before it gets too big. You can find Gold Rush seeds from Park Seed.
• ‘Eight Ball’ is round and compact, which is good for containers. Eight Ball is also available online from Burpee.
• ‘Patio Star’ and ‘Bush Baby’ are two other compact types of zucchini that are bred for small spaces. Explore other compact squash varieties from Burpee.

Common Problems

Zucchini are generally easy to grow and free of any serious issues, but there are a few common zucchini problems to be aware of. Powdery mildew is pretty much a given by late in the season. A white powdery coating on the leaves usually appears midsummer. This common zucchini disease won’t kill your plants, but it can weaken plants and reduce yields.

Good airflow prevents powdery mildew, as does watering at the roots, and pulling off affected leaves. You can also use neem oil to stop powdery mildew from progressing.

Squash vine borers are worse pests on zucchini plants. The larvae bore into the stem near the base and can take a plant down fast. Sudden wilting and frass at the base of plant stems are the signs. Row covers like these from Amazon stop egg-laying earlier in the season, though they have to come off once flowering starts.

Squash bugs are slower to impact plants, but take a toll over time. They cluster under leaves and their egg clusters are copper-colored. Try to find them before they hatch because an established population is difficult to deal with.

Another common problem with growing zucchini is blossom end rot. This is easily avoidable because it usually comes down to inconsistent watering, which prevents the uptake of calcium. Watering zucchini plants consistently prevents this problem and helps form good fruit.

Container Care

If you're short on space, you can grow zucchini in containers quite easily. Choose a container that's at least 24 inches (61 cm) across and 12 inches (31 cm) deep. Zucchini needs the room.

Drainage holes matter, too. Without them, roots will rot. A good potting mix with perlite or vermiculite works well. This is my go-to potting soil from Miracle-Gro. Garden soil compacts too hard and doesn’t drain well in pots.

Compact cultivars, like ‘Fordhook’ from Burpee, are the ones to go with here. A large fabric grow bag from Amazon handles drainage and root aeration well and keeps your growing setup lighter than a rigid pot.

Containers dry out a lot faster than in-ground beds. So daily watering in summer heat is a requirement. Fertilize every two weeks with a balanced liquid feed once plants are established.

Hand pollination is usually necessary since containers often end up in lower-traffic spots for bees. A small brush will work or just pull off a male flower and dab it against the female flower’s center to ensure your plants produce plenty of zucchini.

Companion Plants

Growing companion plants for zucchini can help you get an even bigger harvest and grow healthier plants. Here are some of the best plants to grow alongside summer squash.

Beans and peas fix nitrogen in the soil, which zucchini being a heavy feeder can use. Nasturtiums and marigolds are good for pulling in pollinators and keeping aphids down.

Borage can potentially discourage squash bugs, though the results are mixed, but it doesn’t hurt anything to try. Dill planted along the edges is worth trying as well to encourage beneficial insects that prey on zucchini pests.

Don’t plant zucchini in the same spot as other cucurbits year after year. Utilizing crop rotation outside of the squash family reduces the chance of squash vine borers and soil borne diseases over time.

Frequently Asked Questions

Zucchini Care Must-Haves

If you have witnessed a healthy looking zucchini that suddenly dies, and you see yellow leaves on zucchini plants throughout your garden, you might want to think about checking for squash vine borers. These little pests use squash and gourds as hosts. Sometimes watermelons become their hosts as well.

Vine Borer Causing Zucchini to Suddenly Die

If you have zucchini leaves wilting, it's probably the vine borer. These are larvae of a moth. This particular moth has clear wings and is sometimes mistaken for wasps. The vine borer overwinters in cocoons in the soil and come out as adults in late spring. They deposit eggs on the underside of the leaves. When they hatch, the larva cause yellow leaves on zucchini and the zucchini to suddenly die. If you find your zucchini dying, check under the leaves for signs of the borer. If you find zucchini leaves wilting, the borer is probably present in the stem. The eggs of this vine borer are deposited on the underside of the leaves toward the base of the plant. Once they hatch into larvae, these larvae will bore into the stalks of the plant at the base. When there, they tunnel through the stem and eat it. Once they are mature, you will find them exiting the plants and burrowing into the soil where they overwinter until mature in the spring. It's unfortunate that this vicious cycle begins because you could have a healthy looking zucchini plant suddenly die and not know what caused it if you aren't aware of the existence of this pesky moth. There are ways to control the attack if you catch it early enough, when you find zucchini leaves wilting or yellow leaves on zucchini instead of your zucchini dying. You can use insecticides when the vines are young. Do it right as they start to run. Some of the chemicals used are pyrethrum, malathion, or Sevin. You can apply these as dusts or you can even buy sprays; both will work. Apply the products every seven to ten days to keep the borers at bay. Do this for about five weeks and your zucchini should be free of vine borers for the duration, preventing zucchini suddenly dying. For those plants already affected, you can keep the damaged bored area on the stalk covered with soil and make sure to water the plant regularly. You might be able to save them and change yellow leaves on zucchini back to green in no time.

Zucchini squash is easy to grow but its large leaves can quickly take up space in the garden and prevent fruits from receiving adequate sunlight. Although it's not required, pruning zucchini can help alleviate any overcrowding or shading issues. In addition, pruning can help stimulate additional zucchini growth. If you are asking how or when do I cut off zucchini leaves, this article will provide the information you need. Let's look at how to prune zucchini squash.

How Pruning Helps Growing Zucchini Squash

Zucchini plants are prolific producers when given the right care. Although zucchini can grow in nearly any soil type, it does rely on well-drained soil along with plenty of sunlight to produce adequate fruit. Zucchini plant leaves grow so large that they can often shade the plant itself and reduce sunlight to itself or surrounding plants. This is why cutting leaves to give zucchini more sunlight may be required. In addition, pruning zucchini allows more energy to reach the fruits rather than the majority of zucchini plant leaves. Pruning zucchini plant leaves can also improve air circulation and help to prevent the powdery mildew that zucchini is susceptible to.

When Do I Cut Off Zucchini Leaves?

Once zucchini plants have begun to set fruit, between four and six fruits on vine, you can begin pruning zucchini. Start by nipping out the tips and continue pruning plants as needed throughout the growing season. Be careful not to prune too close to the developing fruits.

How to Prune Zucchini Squash

When pruning zucchini plant leaves, take care not to remove all the leaves. Keep some leaves on the stem, including leaf nodes near the last fruit you want to keep. When cutting leaves to give zucchini more sun, just cut the bigger ones, and make the cuts close to the base of the plant, leaving all others. You can also cut off any dead or brown leaves that may be present. Do not cut any stems, as this will increase the risk for disease.

Your zucchini plant looks healthy. It is covered in lovely blossoms. Then one morning you walk out to your garden to find all those blossoms lying on the ground. The stem is still intact and it looks as though someone took a pair scissors and cut the blossoms right off the stem. Is there a crazy marauder cutting your zucchini blossoms off? No, not at all. This is perfectly normal. There is nothing wrong with your zucchini plant.

Why Do Zucchini Blossoms Fall Off the Plant?

There are two reasons why zucchini blossoms fall off the plant.

Male Zucchini Blossoms

This is the most common reason for zucchini flowers falling off the plant: zucchini plants have male and female flowers. Only female zucchini blossoms can produce zucchini squash. Once male zucchini blossoms have opened to release their pollen, they simply fall off the plant. Many times, a zucchini plant will produce only male blossoms when first in bloom to ensure that pollen will be available when the female blossoms open. The male blossoms will all fall off, making it seem as though the zucchini plant is losing all of its flowers. Don't worry, female blossoms will open soon and you will get zucchini squash.

Poor Pollination

Zucchini blossoms will also fall off the plant if the pollination between the male and female blossoms is poor. Basically, the plant will abort the female blossoms if they are not pollinated well enough. Poor pollination can happen due to a lack of pollinators, like bees or butterflies, high humidity that causes the pollen to clump, rainy weather, or a lack of male blossoms. While zucchini blossoms falling off the plant may look alarming, it is perfectly natural and is not an indicator of any problems with the plant itself.

For the most part, zucchini plants are one of the most prolific performers in the garden, but even the beloved and prolific zucchini is prone to problems. One of these problems can be when the zucchini fruit on your zucchini plant grows just a little bit and then seemingly inexplicably falls off.

What Causes Zucchini Fruit to Fall Off the Plant?

The most common cause of zucchini fruit falling off the plant is no or poor pollination. This means that for some reason, the flowers on your zucchini plant were not properly pollinated and the fruit was unable to produce seeds. Remember, a plant's sole purpose is to produce seeds. When a fruit has shown it will not produce seeds, the plant will "abort" the fruit rather than invest precious time and energy in growing it.

A less common reason for zucchini fruit falling off a plant is blossom end rot. The tell tale signs of this are blacked ends on the stunted fruit.

How Do I Fix Zucchini Fruit Falling Off the Plant Prematurely?

In situations where you have poor pollination, the first place to look is at your own gardening practices. Are you using pesticides in your garden? Pesticides frequently kill off the good pollinator bugs as well as the bad bugs. If you are using pesticides, stop this practice and look into other pest control methods that will not be as harmful to the pollinators.

If you are not using pesticides, your garden may simply be a victim of a national epidemic that is affecting farmers and gardeners across the United States. The honeybee population has declined rapidly in the past decade. Honeybees are the most common kind of pollinator found in the garden and, unfortunately, they are getting harder and harder to find. Try attracting some of the less common pollinators like mason bees, bumble bees, and butterflies to your garden. In a worst case scenario you can hand pollinate the flowers on your zucchini plants.

If the problem is a blossom end rot problem, the situation will most likely remedy itself, but you can speed the process along by adding calcium additives to your soil. Blossom end rot is caused by a calcium deficiency in the soil. 

The zucchini plant is one of the most common vegetables grown in the home garden. One of the reasons is that it is relatively easy to grow. Just because it is easy to grow doesn't mean that the zucchini is without its problems, however. Many people have problems growing zucchini. Let's take a look at a few of these issues when growing zucchini plants and how to fix them.

Zucchini Pests and Insects

One of the most common zucchini problems is insect pests. The zucchini plant basically looks like a buffet table to a great many insects. Some common zucchini pests include:

• cutworms
• cucumber beetles
• squash bugs
• vine borers
• spider mites
• aphids
• whiteflies

Most zucchini pests can be controlled with regular applications of insecticidal soap or pesticides. Since these different pests can affect the zucchini plant at different times in the growing cycle, it's best to start a pest control regimen as soon as the zucchini plant is in the ground to avoid these pest problems on growing zucchini.

Zucchini Diseases

A zucchini plant is also susceptible to a wide variety of diseases. These include:

• powdery mildew
• bacterial wilt
• downy mildew
• yellow mosaic virus
• botrytis blight

Once the zucchini plant is infected with any of these disease problems, it's nearly always fatal to the zucchini plant. The best way to fix disease problems with growing zucchini is to make sure that the zucchini plant doesn't get them in the first place. This can be done mostly through appropriate care of the zucchini plant. Making sure that the plant gets plenty of sun, the right amount of water every week, avoiding top watering, and good airflow through the proper spacing of plants will go a long way towards helping the plant fend off many of these diseases. Also, keeping common zucchini pests away from the plant will help curb the diseases that these insects often carry with them.

Additional Zucchini Problems: Blossoms Falling Off Plant

Zucchini blossoms falling off plants is often an issue gardeners see. While many people think that their zucchini has a problem because the blossoms are mysteriously falling off the plant, this is actually not the case. This is very normal for zucchini plants and is part of their development process. If the ends of your zucchini get soft before they are fully grown, this is caused by squash blossom end rot and is a symptom of a calcium deficiency.