Grand Archidendron Plant Care

Grand Archidendron (Archidendron grandiflorum) belongs to the Fabaceae family within the Archidendron genus. Grand Archidendron is native to northern Australia and New Guinea. Grand Archidendron is also known as Largeflower Archidendron.

Grand Archidendron displays a tall tree, spreading canopy growth habit, reaching up to 30 ft tall with a spread of approximately 20 ft. Grand Archidendron produces showy clusters of small yellow flowers.

Leaf size: approximately 6 inches.

Water a young or newly planted Grand Archidendron 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.

Grand Archidendron thrives in full sun to partial shade.

Archidendron grandiflorum tolerates temperatures of 60–85°F. Grand Archidendron prefers humidity levels of 50–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining, slightly acidic soil mix with added organic matter. Good drainage is essential for Grand Archidendron to prevent waterlogging, which leads to root rot and fungal issues.

Feed Grand Archidendron 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, slightly acidic soil mix with added organic matter. Avoid low spots where water collects after rain.

Grand Archidendron 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.

Grand Archidendron can spread to about 20 ft (6.1 m) and reach about 30 ft (9 m) tall. Space plants about 20 ft (6.1 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 Grand Archidendron 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.

Grand Archidendron 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.

Grand Archidendron can be propagated through seeds, grafting. Similar propagation techniques also apply to bigeminum archidendron plant care, which shares the same genus.

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

Grand Archidendron is susceptible to aphids, caterpillars, 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.

Grand Archidendron grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Grand Archidendron is native to northern Australia and New Guinea. In cooler regions, grow Grand Archidendron as a houseplant or bring it indoors before the first frost.