Bumpy Stemonoporus Plant Care

Bumpy Stemonoporus (Stemonoporus bullatus) belongs to the Dipterocarpaceae family within the Stemonoporus genus. Bumpy Stemonoporus is native to southwestern Sri Lanka. Bumpy Stemonoporus is also known as Bullate Stemonoporus.

Bumpy Stemonoporus displays a tall canopy tree growth habit, reaching up to 50 ft tall with a spread of approximately 30 ft. Bumpy Stemonoporus produces small white or cream-colored flowers in clusters.

Leaf size: approximately 6 inches.

Water a young or newly planted Bumpy Stemonoporus 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.

Bumpy Stemonoporus thrives in full sun to partial shade.

Stemonoporus bullatus tolerates temperatures of 65–85°F. Bumpy Stemonoporus prefers humidity levels of 60–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining loamy soil with high organic content. Good drainage is essential for Bumpy Stemonoporus to prevent waterlogging, which leads to root rot and fungal issues.

Feed Bumpy Stemonoporus 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 high organic content. Avoid low spots where water collects after rain.

Bumpy Stemonoporus is suited to USDA Zone 11b – 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.

Bumpy Stemonoporus can spread to about 30 ft (9.1 m) and reach about 50 ft (15 m) tall. Space plants about 30 ft (9.1 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 Bumpy Stemonoporus 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.

Bumpy Stemonoporus is frost-tender (hardy to USDA zone 11). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Bumpy Stemonoporus can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to stemonoporus acuminatus plant care, which shares the same genus.

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Bumpy Stemonoporus is susceptible to 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.

Bumpy Stemonoporus grows outdoors in USDA Zone 11b – 12b. It survives winters down to planting zone 11b. Bumpy Stemonoporus is native to southwestern Sri Lanka. In cooler regions, grow Bumpy Stemonoporus as a houseplant or bring it indoors before the first frost.