Sick Azalea Leaves - Knowledgebase Question

Columbia, MD
Question by ogertlock
May 19, 1998
Some leaves on one azalea are getting thick and fleshy, turning from light green to a powdery white. Shrub is over 30 years old. Thanks for your help.


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Answer from NGA
May 19, 1998

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 Azalea Leaf Gall is the descriptive name for the disease your azalea has developed. Symptoms include light green, fleshy, bladder-shaped galls that appear on the new leaves in late spring and early summer. The galls change from green to white to red to brown, covered with a white bloom. The galls eventually become hard and dry. It's a fungal disease that's fairly easy to control by picking off the thickened leaves and destroying them. You may want to prune your azalea a bit to help increase light penetration and promote good air circulation.

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