Harmandia mekongensis Plant Care

Harmandia mekongensis (Harmandia mekongensis) belongs to the Olacaceae family within the Harmandia genus.

Harmandia mekongensis displays a compact, slow-growing shrub growth habit, reaching up to 2.5 ft tall with a spread of approximately 2.5 ft. Harmandia mekongensis produces small, inconspicuous greenish flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Harmandia mekongensis 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.

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

Harmandia mekongensis tolerates temperatures of 65–80°F. Harmandia mekongensis 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 Harmandia mekongensis to prevent waterlogging, which leads to root rot and fungal issues.

Feed Harmandia mekongensis 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 organic matter for moisture retention. Avoid low spots where water collects after rain.

Harmandia mekongensis 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.

Harmandia mekongensis 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 Harmandia mekongensis 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.

Harmandia mekongensis 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.

Harmandia mekongensis can be propagated through seeds, stem cuttings.

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

Harmandia mekongensis is susceptible to spider mites, 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.

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