Japanese Snowbell Plant Care

Japanese Snowbell (Styrax japonicus) belongs to the Styracaceae family within the Styrax genus. Japanese Snowbell is native to Korea, Japan, and Southern China. Japanese Snowbell is also known as Japanese Storax.

Japanese Snowbell displays a small to medium-sized tree growth habit, reaching up to 30 ft tall with a spread of approximately 20 ft. Japanese Snowbell produces fragrant white bell-shaped flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Japanese Snowbell every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Japanese Snowbell thrives in full sun to partial shade.

Styrax japonicus tolerates temperatures of 60–80°F. Japanese Snowbell prefers humidity levels of 40–70%.

Well-draining, loamy soil with added organic matter for moisture retention. Good drainage is essential for Japanese Snowbell to prevent waterlogging, which leads to root rot and fungal issues.

Feed Japanese Snowbell every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees in good soil often need little extra feeding, so let weak growth or pale foliage guide you.

Stop feeding by late summer so new growth can harden before winter.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Choose a spot with full sun to partial shade and well-draining, loamy soil with added organic matter for moisture retention. Avoid low spots where water collects after rain.

Japanese Snowbell is suited to USDA Zone 5a – 8b.

Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.

Japanese Snowbell can spread to about 20 ft (6.1 m) and reach about 30 ft (9 m) tall. Space plants about 20 ft (6.1 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.

Planning a row or hedge? Try the tree spacing calculator.

Prune Japanese Snowbell while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.

If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the tree in one year.

Japanese Snowbell is hardy down to USDA zone 5a, so once established it can stay outdoors through winter in that zone and warmer ones.

Water deeply in late autumn before the ground freezes, and spread a 5–8 cm (2–3 in) layer of mulch over the root zone, keeping it away from the trunk.

Young and container-grown trees need extra protection: roots in a pot freeze much more easily than roots in the ground.

Japanese Snowbell can be propagated through softwood cuttings, seeds. Similar propagation techniques also apply to american snowbell plant care, which shares the same genus.

See all plants toxic to cats and plants toxic to dogs.

Japanese Snowbell is susceptible to aphids, scale insects, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Japanese Snowbell grows outdoors in USDA Zone 5a – 8b. It survives winters down to planting zone 5a. Japanese Snowbell is native to Korea, Japan, and Southern China.