Williams Melaleuca Plant Care

Williams Melaleuca (Melaleuca williamsii) belongs to the Myrtaceae family within the Melaleuca genus. Williams Melaleuca is native to an area between north-eastern New South Wales and south eastern Queensland in Australia.

Williams Melaleuca displays a tall, upright tree growth habit, reaching up to 20 ft tall with a spread of approximately 10 ft. Williams Melaleuca produces fluffy, bottlebrush-like spikes in white, cream, pink, or red.

Leaf size: approximately 4 inches.

Water a young or newly planted Williams Melaleuca every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Williams Melaleuca thrives in full sun.

Melaleuca williamsii tolerates temperatures of 50–85°F. Williams Melaleuca prefers humidity levels of 40–70%.

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

Feed Williams Melaleuca every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees 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 full sun and well-draining sandy soil mix with added organic matter like compost. Avoid low spots where water collects after rain.

Williams Melaleuca is suited to USDA Zone 12a.

Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.

Williams Melaleuca can spread to about 10 ft (3 m) and reach about 20 ft (6 m) tall. Space plants about 10 ft (3 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 tree spacing calculator.

Prune Williams Melaleuca 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 tree in one year.

Williams Melaleuca is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Williams Melaleuca can be propagated through seeds, cuttings. Similar propagation techniques also apply to showy honey myrtle plant care, which shares the same genus.

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

Williams Melaleuca is susceptible to aphids, scale insects, leaf-eating caterpillars. 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.

Williams Melaleuca grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Williams Melaleuca is native to an area between north-eastern New South Wales and south eastern Queensland in Australia. In cooler regions, grow Williams Melaleuca as a houseplant or bring it indoors before the first frost.