Grevillea molyneuxii Plant Care

Grevillea molyneuxii (Grevillea molyneuxii) belongs to the Proteaceae family within the Grevillea genus. Grevillea molyneuxii is native to a restricted area of south-eastern New South Wales.

Grevillea molyneuxii displays an upright, bushy shrub growth habit, reaching up to 6 ft tall with a spread of approximately 4 ft. Grevillea molyneuxii produces showy clusters of red, pink, or white flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Grevillea molyneuxii 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.

Grevillea molyneuxii thrives in full sun to partial shade.

Grevillea molyneuxii tolerates temperatures of 50–80°F. Grevillea molyneuxii prefers humidity levels of 40–70%.

Well-draining sandy loam with added organic matter. Good drainage is essential for Grevillea molyneuxii to prevent waterlogging, which leads to root rot and fungal issues.

Feed Grevillea molyneuxii every 8 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 to partial shade and well-draining sandy loam with added organic matter. Avoid low spots where water collects after rain.

Grevillea molyneuxii 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.

Grevillea molyneuxii can spread to about 4 ft (1.2 m) and reach about 6 ft (2 m) tall. Space plants about 4 ft (1.2 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 Grevillea molyneuxii 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.

Grevillea molyneuxii 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.

Grevillea molyneuxii can be propagated through seeds, cuttings. Similar propagation techniques also apply to acacia grevillea plant care, which shares the same genus.

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

Grevillea molyneuxii is susceptible to aphids, scale insects, 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.

Grevillea molyneuxii grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Grevillea molyneuxii is native to a restricted area of south-eastern New South Wales. In cooler regions, grow Grevillea molyneuxii as a houseplant or bring it indoors before the first frost.