23+ Azalea Yellow Leaves Winter. Winter injury entire branches turn brown and die during the growing season. Azaleas that exhibit chlorosis or yellowing leaves may be responding to their soil environment.
If you fertilize them now it may cause them to start producing new leaves … which you don't want, because this tender new growth would likely be burned during the winter's cold weather.
Leaves may turn yellow, red, or purple before they fall off. Select a variety below to get all the details and prices. The most common reason for a newly planted azalea to die is lack of enough water. Deciduous azaleas have no leaves in winter and so they don't suffer from freezing, though in early spring they can suffer from late spring frosts.