Waterhousea Plant Care

Waterhousea (Eugenia reinwardtiana) belongs to the Myrtaceae family within the Eugenia genus. Waterhousea is native to tropical forests in Indonesia, the Australian state of Queensland, and many Pacific Islands, its common names include Cedar Bay cherry, beach cherry, Australian beach cherry, mountain stopper, nīoi (Hawaiian), and a'abang (Chamorro).

Waterhousea displays a compact, bushy shrub growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Waterhousea produces small, white, fragrant flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Waterhousea 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.

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

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

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

Feed Waterhousea 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 with added organic matter like compost or peat moss. Avoid low spots where water collects after rain.

Waterhousea 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.

Waterhousea 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 Waterhousea 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.

Waterhousea 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.

Waterhousea can be propagated through cuttings, air layering, seeds. Similar propagation techniques also apply to mountain stopper plant care, which shares the same genus.

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

Waterhousea 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.

Waterhousea grows outdoors in USDA Zone 9b – 11b. It survives winters down to planting zone 9b. Waterhousea is native to tropical forests in Indonesia, the Australian state of Queensland, and many Pacific Islands, its common names include Cedar Bay cherry, beach cherry, Australian beach cherry, mountain stopper, nīoi (Hawaiian), and a'abang (Chamorro). In cooler regions, grow Waterhousea as a houseplant or bring it indoors before the first frost.