Morning sun is fine, but the afternoon sun can cause the azaleas to decline. Azaleas appear to tolerate the afternoon sun during the cooler months, but during the summer the leaves turn yellow and become dry.
Azaleas appear to prefer a site with filtered sun throughout the day.
Perhaps it's best to select another spot. Each year our green crape myrtle foliage develops a black coating. The black sooty mold fungal growth is annoying but causes minor harm to the crape myrtle foliage. Aphids and whiteflies feeding on the foliage encourage the fungal growth. They start feeding by mid- to late spring and remain through the summer.