Geissois denhamii Plant Care

Geissois denhamii (Geissois denhamii) belongs to the Cunoniaceae family within the Geissois genus. Geissois denhamii is native to the island nation of Vanuatu in the Pacific.

Geissois denhamii displays an upright, branching tree growth habit, reaching up to 15 ft tall with a spread of approximately 10 ft. Geissois denhamii produces small clusters of white or pink flowers.

Leaf size: approximately 5 inches.

Water a young or newly planted Geissois denhamii 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.

Geissois denhamii thrives in full sun to partial shade.

Geissois denhamii tolerates temperatures of 60–80°F. Geissois denhamii prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

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

Feed Geissois denhamii 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 compost for nutrients. Avoid low spots where water collects after rain.

Geissois denhamii is suited to USDA Zone 13a.

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.

Geissois denhamii can spread to about 10 ft (3 m) and reach about 15 ft (5 m) tall. Space plants about 10 ft (3 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 Geissois denhamii 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.

Geissois denhamii is frost-tender (hardy to USDA zone 13). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Geissois denhamii can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to geissois hirsuta plant care, which shares the same genus.

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

Geissois denhamii is susceptible to aphids, scale insects, caterpillars. 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.

Geissois denhamii grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Geissois denhamii is native to the island nation of Vanuatu in the Pacific. In cooler regions, grow Geissois denhamii as a houseplant or bring it indoors before the first frost.