I am trying to find out what is wrong with my Azelas. This started mid last summer, actually when I adjusted my sprinkler system, which gave the Azelas more water, not for sure if that had anything to do with it.
SOLVED: Azalea with spots and losing leaves
Nefitara Port Richey, FL(Zone 9a) Jan 22, 2013
I am not sure excatly, but looks like a fungus of some sort.