Psidiastrum dubium Plant Care

Psidiastrum dubium (Psidiastrum dubium) belongs to the Myrtaceae family within the Psidiastrum genus. Psidiastrum dubium is native to central and southern Florida, the Caribbean, Bermuda, eastern Mexico, and Central America.

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

Leaf size: approximately 4 inches.

Water a young or newly planted Psidiastrum dubium 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.

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

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

Well-draining loamy soil with added compost for nutrients. Good drainage is essential for Psidiastrum dubium to prevent waterlogging, which leads to root rot and fungal issues.

Feed Psidiastrum dubium 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 loamy soil with added compost for nutrients. Avoid low spots where water collects after rain.

Psidiastrum dubium is suited to USDA Zone 9b – 11b.

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.

Psidiastrum dubium 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 Psidiastrum dubium 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.

Psidiastrum dubium is frost-tender (hardy to USDA zone 9). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Psidiastrum dubium can be propagated through seeds, softwood cuttings.

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

Psidiastrum dubium is susceptible to aphids, scale insects, spider mites. 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.

Psidiastrum dubium grows outdoors in USDA Zone 9b – 11b. It survives winters down to planting zone 9b. Psidiastrum dubium is native to central and southern Florida, the Caribbean, Bermuda, eastern Mexico, and Central America. In cooler regions, grow Psidiastrum dubium as a houseplant or bring it indoors before the first frost.