How To Grow And Care For Azaleas
Azaleas can be grown in nearly any garden, adding vibrant color in the spring. While growing and caring for these shrubs is relatively easy, there are some things to consider when adding them to the landscape.
Choosing the Right Azalea
While azaleas can be enjoyed in many different regions, it is best to select a shrub that is hardy for your growing zone.
The next step is to choose a shrub that fits the needs of your landscape. Are you looking for an evergreen azalea that will retain its leaves all year long, or a deciduous type typically with a larger bloom size but with the compromise of loss of leaves in the fall?
The last step is the fun part, it is now time to choose the flower color and bloom time.
Azaleas offer something for everyone in a wide array of flower shades from pastel shades to vibrant hues. Be sure to buy azaleas when in bloom, so you know exactly what the flowers will look like.
Azalea flowering time time varies anywhere from late winter to early summer depending on your region. However, some newer varieties are known to bloom in the spring and then re-bloom again in the fall. You can even extend the flower show by staggering bloom times within the landscape.
Site Considerations
The most important part to successfully growing azaleas is to choose the right planting spot. Azaleas have a shallow root system and require well-drained soil. They will not tolerate a wet root system.
Gardening tips, videos, info and more delivered right to your inbox!
Sign up for the Gardening Know How newsletter today and receive a free download of our DIY eBook "Bring Your Garden Indoors: 13 DIY Projects For Fall And Winter".
These shrubs should also be planted in a slightly shaded spot, including protection from hot afternoon sun. However, too much shade may result in poor bloom production and weak growth. Be sure to choose the right azalea for your garden’s light conditions to ensure a healthy plant with plentiful blooms.
Planting
Azaleas perform best when their planting hole is amended properly. Organic amendments such as compost, peat moss or pine bark help to improve drainage, increase nutrient retention, and lower the soil pH.
The planting hole should be roughly 6” (15 cm.) deeper and 12” (30 cm.) wider than the root ball, to allow the root system enough room to establish into the soil. Incorporate the soil amendments into the backfill of the soil, not exceeding one-third of the total volume.
For an already established shrub, the best time to transplant an azalea depends on your climate. In colder regions, it is best to transplant in the spring, before new growth has begun. In hot climates, the opposite is true. The best time to transplant would be late summer or early fall.
Mulching
A layer of mulch will help retain moisture and keep weeds at bay. Organic mulches such as pine bark, pine needles and dried chopped oak leaves will also help to condition and add acidity to the soil. When applying the mulch, be sure to keep it away from the main trunk and stems of the plant.
Fertilizer
Azaleas are typically not hungry plants so it is not necessary to create an azalea fertilizer schedule for your new blooming beauties. However, an application of fertilizer once the plants begin growth in the spring would be beneficial especially if the growth is slow or if the plant is suffering.
A general, balanced fertilizer would be recommended or a product specific to acid-loving plants.
Apply the product along the drip line of the shrub as the roots can extend from the trunk to the branch tips and beyond. Water well after application. Avoid getting the fertilizer granules on the foliage.
Pruning
While pruning azaleas is never necessary, you may want to maintain size, create a better shape, or rejuvenate the plant.
The best time to prune an azalea is just as the flowers are fading. Cutting the plant at any other time of year will cut off the buds for the next season of flowers. Even waiting just a few weeks from the time the blooms fade can be risky.
Dead, dying or weak branches can be cut out at any time.
Winter protection
Whether you live in the North or South, there are a few precautions you can take to prepare your azaleas for the winter months.
First, you will need to slow down and eventually stop any additional irrigation of your plants in the fall. Also, never fertilize your plants after mid summer as the new growth that may be produced will become susceptible to cold damage.
A layer of mulch around the plant will also help to prepare it for its first freeze.
Common Problems
While azaleas are seldom bothered by pests and disease there are a few common azalea problems that sometimes affect these flowering plants, including scale, lace bugs, root rot and mineral deficiencies.
Azaleas with nutrient deficiencies will have yellowing leaves that may drop, dead branch tips and stunted growth. The addition of specialty nutrient products, such as Iron, may be needed to fix the deficiency.
If a pest is present and an insecticide is needed, apply when the plant is not in bloom to not directly harm the pollinator population. This goes for all pesticides, even those listed as organic.
Amy Draiss, Digital Community Manager at Gardening Know How since 2021, seamlessly blends her hands-on gardening experience with a digital green thumb. With roots in family landscaping and management at a garden center, Amy has cultivated expertise in plants, supplies, and customer relations. Residing in the Midwest, Amy tends to her two-acre haven, showcasing a diverse range of trees, shrubs, and perennials. As the Hydrangea Queen, she shares her love for these blooms and imparts gardening wisdom through videos and social media. Beyond gardening, Amy enjoys quality time with her family, travel, and theme parks. Amy's mission is to inspire and advise plant enthusiasts, fostering flourishing gardens for both seasoned and budding gardeners alike.
-
Best States For Gardening – These Places Are The Top Spots For Gardeners
Looking for a change? These parts of the country are the best places to live for gardeners, according to the data.
By Bonnie L. Grant
-
Best Seeds For Survival – Grow A Garden That Can Outlast Almost Anything
Uncertain about the future? Why not try seeds? They’re easy to save and provide a safety net for good times and bad.
By Bonnie L. Grant
-
How Long Do Mums Last? Plus, How To Make Chrysanthemum Flowers Last Longer
Chrysanthemums have the potential for enduring displays as we enter the quieter months of the year. But how long do mums last? Here’s how to maximize your fall blooms
By Mary Ellen Ellis
-
Time To Transplant Peonies: Why Fall Is The Best Time To Move Peonies, And How To Do It Right
If you want the healthiest peonies, replanting is a great way to boost longevity. Here’s why fall is the best time to move peonies, and how to transplant them correctly.
By Tonya Barnett
-
7 Hydrangea Care Mistakes To Avoid If You Want Stunning Blooms
Hydrangeas are heroes of the summer garden, but these common care errors will stunt plants' growth potential and result in poor flowering.
By Bonnie L. Grant
-
8 Fast-Growing Ground Cover Plants – Hide Bare Soil And Curb Weeds
Ground cover plants are the ideal solution to green up bare patches of soil. These fast-growing varieties will add a professional look to your landscaping design in no time.
By Bonnie L. Grant
-
Time For Peony Trimming: When To Cut Back Peonies For Longer Lasting Plants
You may love peonies, but do you know when to get busy with the snippers? Find out when to cut back peonies, as our expert advice points you in the right direction
By Tonya Barnett
-
6 Common Peony Diseases: How To Identify, Prevent & Treat Them
Peony diseases can ruin blooms and even be fatal to these typically long-lived plants. That’s why it’s important to learn how to identify, prevent, and treat problems before they cause lasting damage.
By Laura Walters
-
Types Of Peonies Every Gardener Should Know
Knowing the different types of peonies helps when you want your garden to include these fabulous plants. Showy and always impressive, peonies are an elegant addition.
By Bonnie L. Grant
-
Orchid Care: How To Grow Happy, Healthy Plants Indoors
Growing orchids as houseplants is such a rewarding hobby. Learn their unique care needs to keep plants thriving and bursting with flowers.
By Melanie Griffiths