Why Are My Azalea Plant Leaves Curling?

If you’ve noticed the leaves on your azalea plants starting to curl, you’re not alone. Curled leaves are one of the most common issues azalea owners face. The good news is, with a little detective work, you can get to the bottom of what’s causing those curls and get your plants back to their beautiful selves.

Potential Causes of Curled Azalea Leaves

There are several possible culprits when azalea leaves start curling. Here are some of the most likely suspects:

Overwatering

Azaleas like moist soil but not soggy soil. Too much water can lead to root rot and cause the leaves to curl. Check the soil moisture before watering. If it’s still damp 1-2 inches below the surface hold off on adding more water.

Overwatering was the most frequently mentioned cause in the sources provided. It’s important not to keep azalea soil too saturated.

Underwatering

On the other hand, inadequate water can also cause curling. Azalea leaves will curl inward to conserve moisture if the soil becomes too dry between waterings.

Sunburn

If azaleas receive too much direct hot sunlight, the leaves can become scorched and curl in an effort to protect themselves. Shelter azaleas from afternoon sun or plant in part shade locations.

Cold Damage

Early spring frosts or cold winter winds can damage azalea leaves. Damaged areas turn brown initially but then curl as they continue deteriorating. Protect plants with coverings when cold temperatures are forecast.

Pests

Insects like lace bugs, thrips, and spider mites suck nutrients from azalea leaves. This causes foliage to distort and curl. Check the undersides of leaves and stems for evidence of pests. Use organic treatments if needed.

Pests were frequently mentioned as a cause of curling across the sources. Be sure to check for signs of infestation.

Diseases

Fungal diseases like petal blight and leaf gall can cause localized leaf curling. Remove and destroy infected plant parts. Improve air flow around plants and avoid overhead watering.

How to Fix and Prevent Curled Leaves

If your azalea leaves are already curling, here are some remedies:

• For watering issues, adjust your watering frequency and volume accordingly

• For sun damage, move plants to a shadier spot

• For pests and diseases, use organic sprays and prune off affected leaves

• Increase nutrients with acidic fertilizer to outgrow damage

To avoid future curling:

• Water thoroughly only when top few inches of soil are dry

• Provide afternoon shade for leaves

• Choose disease-resistant varieties

• Keep plants well-spaced for airflow

• Apply neem oil or introduce beneficial insects to deter pests

• Protect from cold winds and frost

With some adjustments to care, most curling leaves can be outgrown by midsummer. But prevention is the best cure, so proactively modify growing conditions to keep leaves flat and healthy.