Japanese clethra
Clethra barbinervis
Overview
Japanese Clethra is an amazing deciduous shrub species that is native to Japan. It is known for its sweetly scented white flowers, which bloom in July and August. Its glossy green leaves turn yellow and orange in the fall, creating an attractive show in the autumn. This species is hardy in both sun and part shade and only needs light pruning for maintenance. It is also disease and insect resistant, making it an easy-care addition to any landscape. Japanese Clethra also attracts birds, butterflies and other pollinators to its sweetly scented flowers. Its interestingly textured leaves and vibrant fall foliage are sure to add to any garden.
Care Guide
Watering
Japanese clethra (Clethra barbinervis) is a vase shaped, deciduous shrub that prefers moist, well-drained soil. It should be watered right after planting and once every 7 to 10 days for the first few months. Thereafter, water once every 2-3 weeks during the warm months, making sure to keep the soil moist but not soggy. During the winter months, water only if the soil appears dry.
Light
Japanese clethras typically prefer bright filtered light or partial shade for best leaf coloration and flowering. 6 or more hours of sunlight per day (during the peak of summer) is optimal, however they also grow well in light shade, where they receive 3-6 hours per day. Excessively shady spots may slow their growth rate, reduce flower production, and cause leaves to become pale or yellow.
Soil
Well-drained
Temperature
Hardiness zone 5-8.
Pruning
When it comes to pruning Japanese clethra (Clethra barbinervis) most gardeners recommend pruning in the winter, when the tree is dormant. Pruning should be minimal, and only necessary to remove diseased, damaged, or dead branches and to maintain the desired size and shape. When pruning, be sure to use clean, sharp shears to make precise cuts. Additionally, it is important to avoid pruning too much as this may lead to diminished flowering and decreased health of the shrub.
Propagation
Greenwood Cuttings, Seed Propagation
Uses & Symbolism
Attracts: Butterflies.
Diseases & Pests
Common pests: Pest resistant, Disease resistant, Deer resistant.
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