Miyagi oak Plant Care

Miyagi oak (Quercus miyagii) belongs to the Fagaceae family within the Quercus genus. Miyagi oak is native to the Ryukyu Islands. Miyagi oak is also known as Quercus miyagii var. fusiformis.

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

Leaf size: approximately 6 inches.

Water a young or newly planted Miyagi 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.

Miyagi oak thrives in full sun.

Quercus miyagii tolerates temperatures of 20–100°F. Miyagi oak prefers humidity levels of 30–70%.

Well-draining loamy soil with good organic content. Good drainage is essential for Miyagi 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.

Miyagi oak is suited to USDA Zone 10a – 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.

Miyagi 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 Miyagi 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.

Miyagi oak is frost-tender (hardy to USDA zone 10). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

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

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Miyagi 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.

Miyagi oak grows outdoors in USDA Zone 10a – 11b. It survives winters down to planting zone 10a. Miyagi oak is native to the Ryukyu Islands. In cooler regions, grow Miyagi oak as a houseplant or bring it indoors before the first frost.