It is normal for the Native Azaleas to have many discolored leaves during summer due to excessive heat. Native Azaleas begin losing their leaves in September, but often will drop most or all of their leaves during August in times of extreme heat and drought. Native azalea foliage is not pretty during the summer. There is really nothing you can do to prevent this. Leaf drop is a survival tactic possessed by many of our native plants that helps them survive heat and drought. Many collectors draw attention away from the unattractive summer foliage of native azaleas by interspersing evergreens and summer blooming plants in the planting area to serve as other beauty on which to focus.