Answer: 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.
Q&A Library Searching Tips