Pleiospermium longisepalum Plant Care

Pleiospermium longisepalum (Pleiospermium longisepalum) belongs to the Rutaceae family within the Pleiospermium genus. Pleiospermium longisepalum is native to the state of Sabah on the island of Borneo.

Pleiospermium longisepalum displays a compact, bushy shrub growth habit, reaching up to 2.5 ft tall with a spread of approximately 2.5 ft. Pleiospermium longisepalum produces small white flowers in clusters.

Leaf size: approximately 4 inches.

Water a young or newly planted Pleiospermium longisepalum 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.

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

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

Well-draining, slightly acidic soil mix with added organic matter like compost. Good drainage is essential for Pleiospermium longisepalum to prevent waterlogging, which leads to root rot and fungal issues.

Feed Pleiospermium longisepalum 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, slightly acidic soil mix with added organic matter like compost. Avoid low spots where water collects after rain.

Pleiospermium longisepalum is suited to USDA Zone 10b – 12b.

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.

Pleiospermium longisepalum can spread to about 3 ft (0.8 m) and reach about 3 ft (1 m) tall. Space plants about 3 ft (0.8 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 Pleiospermium longisepalum 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.

Pleiospermium longisepalum is frost-tender (hardy to USDA zone 10). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Pleiospermium longisepalum can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to pleiospermium latialatum plant care, which shares the same genus.

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

Pleiospermium longisepalum is susceptible to scale insects, spider mites, aphids. 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.

Pleiospermium longisepalum grows outdoors in USDA Zone 10b – 12b. It survives winters down to planting zone 10b. Pleiospermium longisepalum is native to the state of Sabah on the island of Borneo. In cooler regions, grow Pleiospermium longisepalum as a houseplant or bring it indoors before the first frost.