Carambola Plant Care

Carambola (Averrhoa carambola) belongs to the Oxalidaceae family within the Averrhoa genus. Carambola is native to tropical Southeast Asia. Carambola is also known as Star Fruit, Starapple, Chinese Gooseberry.

Carambola displays a small, bushy tree growth habit, reaching up to 10 ft tall with a spread of approximately 8 ft. Carambola produces small, pink-white flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Carambola every 7–10 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.

Carambola thrives in full sun to partial shade.

Averrhoa carambola tolerates temperatures of 65–85°F. Carambola prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

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

Feed Carambola 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.

Carambola is suited to USDA Zone 10a – 12b.

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.

Carambola can spread to about 8 ft (2.4 m) and reach about 10 ft (3 m) tall. Space plants about 8 ft (2.4 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 Carambola 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.

Carambola is frost-tender (hardy to USDA zone 10). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Carambola can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to bilimbi plant care, which shares the same genus.

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

Carambola 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.

Carambola grows outdoors in USDA Zone 10a – 12b. It survives winters down to planting zone 10a. Carambola is native to tropical Southeast Asia. In cooler regions, grow Carambola as a houseplant or bring it indoors before the first frost.