Coast silver oak Plant Care

Coast silver oak (Brachylaena discolor var. mossambicensis) belongs to the Asteraceae family within the Brachylaena genus. Coast silver oak is native to Mozambique, South Africa. Coast silver oak is also known as Wild silver oak, Coastal Brachylaena.

Coast silver oak displays a small tree or shrub growth habit, reaching up to 10 ft tall with a spread of approximately 6 ft. Coast silver oak produces small, inconspicuous flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Coast silver oak 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.

Coast silver oak thrives in full sun to partial shade.

Brachylaena discolor var. mossambicensis tolerates temperatures of 60–80°F. Coast silver oak prefers humidity levels of 40–70%.

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

Feed Coast silver oak 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 sandy loam with added organic matter. Avoid low spots where water collects after rain.

Coast silver oak is suited to USDA Zone 13a.

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.

Coast silver oak can spread to about 6 ft (1.8 m) and reach about 10 ft (3 m) tall. Space plants about 6 ft (1.8 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 tree spacing calculator.

Prune Coast silver oak 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.

Coast silver oak 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.

Coast silver oak can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to coast silver oak plant care, which shares the same genus.

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Coast silver oak is susceptible to aphids, 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.

Coast silver oak grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Coast silver oak is native to Mozambique, South Africa. In cooler regions, grow Coast silver oak as a houseplant or bring it indoors before the first frost.