Oak Plant Care

Oak (Quercus amamiana) belongs to the Fagaceae family within the Quercus genus. Oak is native to eastern and southern Asia.

Oak displays a large deciduous tree growth habit, reaching up to 80 ft tall with a spread of approximately 60 ft. Oak produces inconspicuous catkins.

Leaf size: approximately 6 inches.

Water a young or newly planted 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.

Oak thrives in full sun.

Quercus amamiana tolerates temperatures of 50–100°F. Oak prefers humidity levels of 30–70%.

Well-draining loamy soil with good organic content. Good drainage is essential for Oak to prevent waterlogging, which leads to root rot and fungal issues.

Choose a spot with full sun and well-draining loamy soil with good organic content. Avoid low spots where water collects after rain.

Oak is suited to USDA Zone 9b – 11b.

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.

Oak can spread to about 60 ft (18.3 m) and reach about 80 ft (24 m) tall. Space plants about 60 ft (18.3 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 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.

Oak 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.

Oak can be propagated through acorns, grafting. Similar propagation techniques also apply to english oak plant care, which shares the same genus.

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

Oak is susceptible to oak leaf blister, oak wilt, gypsy moth. 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.

Oak grows outdoors in USDA Zone 9b – 11b. It survives winters down to planting zone 9b. Oak is native to eastern and southern Asia. In cooler regions, grow Oak as a houseplant or bring it indoors before the first frost.