Gardeners Are Spraying Milk on Plants This Spring to Prevent Powdery Mildew – but I Found a Better Solution That Gets Rid of Pests, Too
There's an organic solution that gets rid of powdery mildew fast and fights pests at the same time. It's my go-to spray for healthy plants indoors and out.
If your ornamental and edible plant leaves are starting to turn white and splotchy, you may be facing a case of powdery mildew. There are several different types of fungi that cause this common garden disease. And it seems like there are just as many DIY solutions floating around online.
One of the most popular powdery mildew treatments I’ve seen on the online gardening forums is spraying your plants with milk. I’ve tried this one several times over the years, whenever my squash plants have been plagued by powdery mildew. But unfortunately, it’s never done much to dispel this disease.
However, there is one solution that I’ve discovered since then that starts working after just one application and it also prevents pests, too. If you’re an avid gardener, you may already have this easy-to-find spray on hand. But if not, it’s a great product to have in your gardening arsenal to solve a variety of plant problems both indoors and out. Find out my secret weapon against powdery mildew and pests.
My Secret Weapon Against Powdery Mildew
Neem oil is a fast and effective way to stop the spread of powdery mildew on plants and get rid of unwanted pests at the same time. Plus, you can use it to solve a variety of other plant problems both indoors and in the garden.
Benefits of Neem Oil
Neem oil has so many uses in the garden, including fighting powdery mildew. It is made from the seeds of the neem tree (Azadirachta indica) and it is incredibly versatile. Plus, it’s organic and safe to use on edible plants, ornamentals, and even houseplants. You can find neem oil online from Amazon or at almost any garden center.
This plant-based solution can prevent a whole host of common garden diseases, including sooty mold, black spot, and rust. It can also get rid of a wide array of unwanted garden pests, like scale, squash bugs, beetle larvae, caterpillars, lacebugs, leaf hoppers, leafminers, mealybugs, thrips, and whiteflies.
One of the best uses for neem oil, though, is to prevent and stop powdery mildew in the garden. Neem oil can’t completely get rid of powdery mildew that’s already on plants, but it will stop its spread and keep it from ruining your vegetable harvest and the blooms in your ornamental garden.
How to Use Neem Oil for Powdery Mildew
Despite being an organic solution to powdery mildew as well as other problems in the garden, neem oil does have some safety concerns for both plants and beneficial insects. It can negatively impact important pollinators, like bees and butterflies, so it’s important to be careful when using it in your garden.
Apply neem oil in the evening after sunset, when most pollinators are done working for the day to prevent harming these beneficial insects. Avoid spraying neem oil on plants that are in bloom and pollinators will likely visit. Also, be sure to keep neem oil away from water sources that supply pollinators. For example, if you have a pollinator watering station in your garden, don’t spray neem oil near it.
Overusing neem oil can also harm plants, especially tender seedlings and young plants. For the best results and to prevent damage to your plants, apply neem oil as soon as you see powdery mildew appear. Then wait 7 to 10 days before reapplying. Only reapply if the problem continues to worsen.
Neem oil often stops powdery mildew after just one application. However, it doesn’t get rid of powdery mildew that’s already present on leaves. So watch to see if the disease spreads before applying again.
Other Ways to Prevent Powdery Mildew
Ultimately, powdery mildew won’t kill your plants. However, severe cases can lessen harvests and weaken plants. Prevention is always the best defense in your garden. To stop powdery mildew before it even begins, make sure you space your plants far enough apart to provide good airflow.
Also, try to avoid overhead irrigation. Wet leaves, especially on crowded plants, combined with warm summer temperatures are the ideal conditions for breeding powdery mildew. A simple drip irrigation system that you can set up quickly, like this drip irrigation kit from Home Depot that I use in my own garden, keeps foliage dry and prevents fungal diseases.
Don’t let the powdery mildew take over your garden. Prevent problems before they start by following proper spacing and watering at the roots. But if you are already having issues with fungus in your garden, give neem oil a try and leave the milk for your morning cereal.
