Red-leafed Trigonostemon Plant Care

Red-leafed Trigonostemon (Trigonostemon rufescens) belongs to the Euphorbiaceae family within the Trigonostemon genus. Red-leafed Trigonostemon is native to Peninsular Malaysia. Red-leafed Trigonostemon is also known as Red-stemmed Trigonostemon.

Red-leafed Trigonostemon displays an upright, bushy shrub growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Red-leafed Trigonostemon produces small, inconspicuous flowers in clusters.

Leaf size: approximately 4 inches.

Water a young or newly planted Red-leafed Trigonostemon 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.

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

Trigonostemon rufescens tolerates temperatures of 65–80°F. Red-leafed Trigonostemon prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining soil mix with high organic content, such as a blend of peat moss, perlite, and pine bark. Good drainage is essential for Red-leafed Trigonostemon to prevent waterlogging, which leads to root rot and fungal issues.

Feed Red-leafed Trigonostemon 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 soil mix with high organic content, such as a blend of peat moss, perlite, and pine bark. Avoid low spots where water collects after rain.

Red-leafed Trigonostemon is suited to USDA Zone 11a – 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.

Red-leafed Trigonostemon can spread to about 2 ft (0.6 m) and reach about 3 ft (1 m) tall. Space plants about 2 ft (0.6 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 plant spacing calculator.

Prune Red-leafed Trigonostemon 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.

Red-leafed Trigonostemon 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.

Red-leafed Trigonostemon can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to trigonostemon cherrieri plant care, which shares the same genus.

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

Red-leafed Trigonostemon 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.

Red-leafed Trigonostemon grows outdoors in USDA Zone 11a – 12b. It survives winters down to planting zone 11a. Red-leafed Trigonostemon is native to Peninsular Malaysia. In cooler regions, grow Red-leafed Trigonostemon as a houseplant or bring it indoors before the first frost.