Giant beech Plant Care

Giant beech (Nothofagus grandis) belongs to the Nothofagaceae family within the Nothofagus genus. Giant beech is native to New Guinea.

Giant beech displays a tall, deciduous tree growth habit, reaching up to 100 ft tall with a spread of approximately 50 ft. Giant beech produces inconspicuous flowers, small clusters.

Leaf size: approximately 4 inches.

Water a young or newly planted Giant beech 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.

Giant beech thrives in full sun to partial shade.

Nothofagus grandis tolerates temperatures of 50–80°F. Giant beech prefers humidity levels of 40–70%.

Well-draining, acidic soil with high organic content. Good drainage is essential for Giant beech to prevent waterlogging, which leads to root rot and fungal issues.

Feed Giant beech 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, acidic soil with high organic content. Avoid low spots where water collects after rain.

Giant beech 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.

Giant beech can spread to about 50 ft (15.2 m) and reach about 100 ft (30 m) tall. Space plants about 50 ft (15.2 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 Giant beech 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.

Giant beech 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.

Giant beech can be propagated through seeds, hardwood cuttings. Similar propagation techniques also apply to roble plant care, which shares the same genus.

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

Giant beech 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.

Giant beech grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Giant beech is native to New Guinea. In cooler regions, grow Giant beech as a houseplant or bring it indoors before the first frost.