Corynocarpus rupestris Plant Care

Corynocarpus rupestris (Corynocarpus rupestris) belongs to the Corynocarpaceae family within the Corynocarpus genus. Corynocarpus rupestris is native to the eastern coast of Australia, in the states of New South Wales and Queensland.

Corynocarpus rupestris displays a small to medium-sized tree growth habit, reaching up to 20 ft tall with a spread of approximately 15 ft. Corynocarpus rupestris produces small inconspicuous flowers.

Leaf size: approximately 6 inches.

Water a young or newly planted Corynocarpus rupestris 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.

Corynocarpus rupestris thrives in full sun to partial shade.

Corynocarpus rupestris tolerates temperatures of 50–85°F. Corynocarpus rupestris prefers humidity levels of 40–70%.

Well-draining sandy loam with added organic matter. Good drainage is essential for Corynocarpus rupestris to prevent waterlogging, which leads to root rot and fungal issues.

Feed Corynocarpus rupestris 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 sandy loam with added organic matter. Avoid low spots where water collects after rain.

Corynocarpus rupestris is suited to USDA Zone 12a.

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.

Corynocarpus rupestris can spread to about 15 ft (4.6 m) and reach about 20 ft (6 m) tall. Space plants about 15 ft (4.6 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 Corynocarpus rupestris 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.

Corynocarpus rupestris is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

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

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

Corynocarpus rupestris is susceptible to scale insects, mealybugs. 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.

Corynocarpus rupestris grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Corynocarpus rupestris is native to the eastern coast of Australia, in the states of New South Wales and Queensland. In cooler regions, grow Corynocarpus rupestris as a houseplant or bring it indoors before the first frost.