Sebastiania Plant Care

Sebastiania (Sebastiania bicalcarata) belongs to the Euphorbiaceae family within the Sebastiania genus. Sebastiania is native to Goiás, Brazil.

Sebastiania displays an upright, branching shrub growth habit, reaching up to 4 ft tall with a spread of approximately 3 ft. Sebastiania produces small greenish flowers in clusters.

Leaf size: approximately 5 inches.

Water a young or newly planted Sebastiania every 7–10 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

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

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

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

Feed Sebastiania every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs 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 sandy loam with added organic matter. Avoid low spots where water collects after rain.

Sebastiania is suited to USDA Zone 13b.

Plant container-grown or balled-and-burlapped shrubs in spring or early autumn, setting the root flare at soil level, and water well after planting.

Sebastiania can spread to about 3 ft (0.9 m) and reach about 4 ft (1 m) tall. Space plants about 3 ft (0.9 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 plant spacing calculator.

Prune Sebastiania 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 shrub in one year.

Sebastiania 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.

Sebastiania can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to sebastiania argutidens plant care, which shares the same genus.

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Sebastiania is susceptible to spider mites, aphids, 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.

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