China Aster Plant Care

China Aster (Callistephus chinensis) belongs to the Asteraceae family within the Callistephus genus. China Aster is native to China and Korea. China Aster is also known as Annual Aster, Aster, Aster chinensis.

China Aster displays an upright, bushy shrub growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. China Aster produces colorful daisy-like flowers in various shades.

Leaf size: approximately 4 inches.

Water a young or newly planted China Aster every 4–7 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

China Aster thrives in full sun to partial shade.

Callistephus chinensis tolerates temperatures of 60–75°F. China Aster prefers humidity levels of 40–60%.

Well-draining loamy soil with added compost for nutrients. Good drainage is essential for China Aster to prevent waterlogging, which leads to root rot and fungal issues.

Feed China Aster every 4 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs 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 compost for nutrients. Avoid low spots where water collects after rain.

China Aster is suited to USDA Zone 6b – 11b.

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

China Aster can spread to about 2 ft (0.5 m) and reach about 2 ft (1 m) tall. Space plants about 2 ft (0.5 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 plant spacing calculator.

Prune China Aster 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 shrub in one year.

China Aster is hardy down to USDA zone 6b, 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 shrubs need extra protection: roots in a pot freeze much more easily than roots in the ground.

China Aster can be propagated through seeds.

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China Aster is susceptible to aphids, spider mites, whiteflies. 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.

China Aster grows outdoors in USDA Zone 6b – 11b. It survives winters down to planting zone 6b. China Aster is native to China and Korea.