USDA Zone 6 (-10°F) to USDA Zone 9 (20°F).
3-20' (1-6 m)
Apply anti-transpirant before freeze
Flowering, broad-leaved shrub produces masses of spectacular flower clusters. Glossy foliage is evergreen. Beautiful at woodland's edge or as a specimen. Growth becomes more open in deeper shade. Prune in spring after flowering. Prefers rich, acid (sour) soil.