Hydrangea zhewanensis Plant Care

Hydrangea zhewanensis (Hydrangea zhewanensis) belongs to the Hydrangeaceae family within the Hydrangea genus. Hydrangea zhewanensis is native to China.

Hydrangea zhewanensis displays a deciduous shrub, mounding habit growth habit, reaching up to 6 ft tall with a spread of approximately 6 ft. Hydrangea zhewanensis produces large, showy clusters of pink, blue, purple, or white flowers.

Leaf size: approximately 6 inches.

Water a young or newly planted Hydrangea zhewanensis every 3–7 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.

Hydrangea zhewanensis thrives in partial shade to filtered sun. Avoid placing Hydrangea zhewanensis in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Hydrangea zhewanensis tolerates temperatures of 60–75°F. Hydrangea zhewanensis prefers humidity levels of 40–70%.

Rich, moist, well-draining soil with plenty of organic matter. Good drainage is essential for Hydrangea zhewanensis to prevent waterlogging, which leads to root rot and fungal issues.

Feed Hydrangea zhewanensis every 4 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 partial shade to filtered sun and rich, moist, well-draining soil with plenty of organic matter. Avoid low spots where water collects after rain.

Hydrangea zhewanensis is suited to USDA Zone 6a – 9b.

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.

Hydrangea zhewanensis can spread to about 6 ft (1.8 m) and reach about 6 ft (2 m) tall. Space plants about 6 ft (1.8 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 Hydrangea zhewanensis 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.

Hydrangea zhewanensis is hardy down to USDA zone 6a, 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.

Hydrangea zhewanensis can be propagated through softwood cuttings, layering, division. Similar propagation techniques also apply to hydrangea plant care, which shares the same genus.

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Hydrangea zhewanensis is susceptible to aphids, spider mites, scale insects. 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.

Hydrangea zhewanensis grows outdoors in USDA Zone 6a – 9b. It survives winters down to planting zone 6a. Hydrangea zhewanensis is native to China.