Clethra barbinervis

Japanese Clethra
 

Mature Size, Growth, Longevity

Average mature size of 10-20' tall and 4-10' wide. Rounded habit. Fast growth rate in youth, with age growth rate moderates.

Native Range

Native to Japan.

Flower and Fruit Details

Flowers are slightly fragrant, white, 0.3" diameter flowers, borne in 4-6" long, terminal, racemose panicles from July to August on current season's growth. Fruits are small capsules, born in long terminal spikes, turning brown in fall.

Leaf and Bark Features

Leaves are dark green, arranged alternately. Tend to be clustered at the end of the branch, presenting a whorled appearance. Bronze red to maroon fall color, usually not showy. Bark is good looking, smooth, gray to brown, sometimes exfoliating.

Culture and Care

Prefers moist, organic-laden, drained soils in partial shade. Avoid hot, dry sites. Zones 5.

Taxa and Plants of this Species at BCA

The following taxa are (or were) represented in the collections at Boone County Arboretum. Additional taxa may be available in the trade that are not included here.

  • Clethra barbinervis // Japanese Clethra ("straight species")
    Shrub.
    -- not currently in our collection --