|Upright, hardy, deciduous shrub with elliptic to oblong, 2 to 6 inch long leaves. Single, trumpet-shaped, light yellow flowers with darker throats and pale orange blotches, 2 3/4 inches wide. Flowers are borne in huge, showy trusses of 13 blooms per cluster. Bloom time is from mid to late spring.
The deciduous hybrid azalea, like it's native counterpart, is known for excellent fall color and unsurpassed spring flowers. The deciduous azalea is usually less picky about soil conditions, though it too prefers well-drained and acid conditions.
The Knap Hill and Exbury azaleas are English hybrids resulting from crosses between R. molle, R. calendulaceum, R. arborescens, and R. occidentale. The Bovee Knap Hill hybrids were developed from imported Knap Hill seeds at the Bovees Nursery in Portland, Oregon. Though azaleas have a potentially large list of possible pest and disease problems, they are usually trouble-free if planted correctly in proper cultural conditions.