Robust Commidendrum Plant Care

Robust Commidendrum (Commidendrum robustum) belongs to the Asteraceae family within the Commidendrum genus. Robust Commidendrum is native to the island of Saint Helena in the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha. Robust Commidendrum is also known as Greenwood, Aster burchellii, Aster roxburghii.

Robust Commidendrum displays a small tree or shrub growth habit, reaching up to 6 ft tall with a spread of approximately 4 ft. Robust Commidendrum produces small white or yellow flowers in clusters.

Leaf size: approximately 3 inches.

Water a young or newly planted Robust Commidendrum 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.

Robust Commidendrum thrives in full sun to partial shade.

Commidendrum robustum tolerates temperatures of 65–80°F. Robust Commidendrum prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining sandy soil with added organic matter for nutrients. Good drainage is essential for Robust Commidendrum to prevent waterlogging, which leads to root rot and fungal issues.

Feed Robust Commidendrum 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 soil with added organic matter for nutrients. Avoid low spots where water collects after rain.

Robust Commidendrum is suited to USDA Zone 13b.

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.

Robust Commidendrum can spread to about 4 ft (1.2 m) and reach about 6 ft (2 m) tall. Space plants about 4 ft (1.2 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 Robust Commidendrum 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.

Robust Commidendrum 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.

Robust Commidendrum can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to round-leaved gumwood plant care, which shares the same genus.

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

Robust Commidendrum is susceptible to aphids, whiteflies, 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.

Robust Commidendrum grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Robust Commidendrum is native to the island of Saint Helena in the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha. In cooler regions, grow Robust Commidendrum as a houseplant or bring it indoors before the first frost.