Rhododendron serrulatum (Sweet Azalea) 6-8ft; white mid-late summer flowers. Appreciates shade.Tolerates swampy areas.
These are blooming now July 2013 in the nursery. Adding this species to your azalea collection will extend the blooming season! Zone 4-9
I've been collecting native deciduous azaleas for some time and Mailorder Natives has wonderful plants at good prices. Highly recommend.