Native Plumleaf Azalea
In the south, it's the time of the year for the Plumleaf Azalea, Rhododendron prunifolium, to bloom. See link.
Although it's native range is limited to a small area in SW GA & SE AL (Zone 8), it is a popular summer flowering shrub for native plant gardening enthusiasts, since hardiness is rated at -20Â°F. (Zone 5a).
Same as the other native Azalea species & hybrids, some direct sunlight is necessary for best flowering performance.
Here is a link that might be useful: Rhododendron prunifolium & Providence Canyon,GA