Mountain Whiteywood Plant Care

Mountain Whiteywood (Nestegis montana) belongs to the Oleaceae family within the Nestegis genus. Mountain Whiteywood is native to New Zealand. Mountain Whiteywood is also known as Mountain Maire, Maire.

Mountain Whiteywood displays a small to medium-sized tree growth habit, reaching up to 25 ft tall with a spread of approximately 15 ft. Mountain Whiteywood produces small white to cream-colored flowers in clusters.

Leaf size: approximately 4 inches.

Water a young or newly planted Mountain Whiteywood 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.

Mountain Whiteywood thrives in full sun to partial shade.

Nestegis montana tolerates temperatures of 50–85°F. Mountain Whiteywood prefers humidity levels of 40–70%.

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

Feed Mountain Whiteywood 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 to partial shade and well-draining loamy soil with added compost for nutrients. Avoid low spots where water collects after rain.

Mountain Whiteywood is suited to USDA Zone 9a – 10b.

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.

Mountain Whiteywood can spread to about 15 ft (4.6 m) and reach about 25 ft (8 m) tall. Space plants about 15 ft (4.6 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 tree spacing calculator.

Prune Mountain Whiteywood 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.

Mountain Whiteywood 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.

Mountain Whiteywood can be propagated through seeds, semi-hardwood cuttings. Similar propagation techniques also apply to coastal maire plant care, which shares the same genus.

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Mountain Whiteywood is susceptible to aphids, scale insects. 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.

Mountain Whiteywood grows outdoors in USDA Zone 9a – 10b. It survives winters down to planting zone 9a. Mountain Whiteywood is native to New Zealand. In cooler regions, grow Mountain Whiteywood as a houseplant or bring it indoors before the first frost.