Rhododendron ( Sorcerer Glenn Dale Azalea )
The Glenn Dale evergreen plant cross were developed in Maryland from R. indicum , R. kaempferi , R. simsii and many other metal money and hybrids . They are compact , fan out , evergreen plant azaleas recrudesce in the first place for cold hardiness along the mid - Atlantic states . Flowers are carry in showy trusses of 1 to 4 per cluster . Bloom time is later April in warmer areas and as late as mid - June in cool climates ....