Sumatran Crato Plant Care

Sumatran Crato (Cratoxylum sumatranum subsp. sumatranum) belongs to the Hypericaceae family within the Cratoxylum genus.

Sumatran Crato displays a small to medium-sized tree growth habit, reaching up to 20 ft tall with a spread of approximately 15 ft. Sumatran Crato produces small, white, fragrant flowers in clusters.

Leaf size: approximately 5 inches.

Water a young or newly planted Sumatran Crato 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.

Sumatran Crato thrives in partial shade to full sun.

Cratoxylum sumatranum subsp. sumatranum tolerates temperatures of 60–85°F. Sumatran Crato prefers humidity levels of 50–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining, slightly acidic soil with high organic matter content. Good drainage is essential for Sumatran Crato to prevent waterlogging, which leads to root rot and fungal issues.

Feed Sumatran Crato 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 partial shade to full sun and well-draining, slightly acidic soil with high organic matter content. Avoid low spots where water collects after rain.

Sumatran Crato 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.

Sumatran Crato 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 Sumatran Crato 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.

Sumatran Crato 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.

Sumatran Crato can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to cratoxylum arborescens plant care, which shares the same genus.

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

Sumatran Crato is susceptible to aphids, 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.

Sumatran Crato grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. In cooler regions, grow Sumatran Crato as a houseplant or bring it indoors before the first frost.