A couple weeks ago I purchased and planted two Encore Azaleas. As you can see from the picture below, some of the leaves have dark brown spots with well-defined lines. Additionally, some of the petals and flowers are wilting and dying early.
It has been a hot couple of weeks, and these azaleas are exposed to a pretty large amount of sunlight. Are these problems heat/sun related, or are they the result of a fungus or disease? Any help is much appreciated!