Usambara Strebus Plant Care

Usambara Strebus (Streblus usambarensis) belongs to the Moraceae family within the Streblus genus.

Usambara Strebus displays a small to medium-sized tree growth habit, reaching up to 15 ft tall with a spread of approximately 10 ft. Usambara Strebus produces small inconspicuous flowers.

Leaf size: approximately 6 inches.

Water a young or newly planted Usambara Strebus 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.

Usambara Strebus thrives in bright indirect light. Avoid placing Usambara Strebus in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Streblus usambarensis tolerates temperatures of 65–80°F. Usambara Strebus prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining loamy soil with added organic matter for moisture retention. Good drainage is essential for Usambara Strebus to prevent waterlogging, which leads to root rot and fungal issues.

Feed Usambara Strebus 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 bright indirect light and well-draining loamy soil with added organic matter for moisture retention. Avoid low spots where water collects after rain.

Usambara Strebus 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.

Usambara Strebus 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 Usambara Strebus 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.

Usambara Strebus 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.

Usambara Strebus can be propagated through stem cuttings, air layering. Similar propagation techniques also apply to streblus smithii plant care, which shares the same genus.

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

Usambara Strebus 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.

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