|Flowers are scarlet red, and in trusses of funnel-shaped blooms. Knap Hill / Exbury Hybrids are both English bred crosses. They are upright, up to 6 feet tall and up to 6 feet wide. Trusses of up to 30 trumpet-shaped flowers, each to 3 inches wide, are borne in 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 acid conditions.
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.