Family

Clethraceae

Description

Japanese clethra (Clethra barbinervis) is a multi-stemmed deciduous shrub or small tree grown for its elegant, upright form, exfoliating bark, and showy summer flowers. Long, fragrant white racemes appear in mid to late summer, attracting bees and other pollinators at a time when many shade-tolerant plants are not in bloom. As the seasons turn, its leaves shift to rich shades of gold and russet, enhancing fall displays.

 

Native to the woodlands and mountain slopes of Japan, Korea, and parts of China, Clethra barbinervis prefers acidic, moist, well-drained soil and partial shade. However, it can tolerate more sun with consistent moisture. Its cinnamon-colored bark peels in patches as it matures, offering winter interest and textural contrast. Although less common in cultivation than its eastern North American cousin (Clethra alnifolia), it offers a taller, more tree-like habit and year-round appeal in woodland or naturalistic garden settings.

Bloom Time

July to August

Range / Habitat

Eastern China & Japan