Arnhem Land Jacksonia Plant Care

Arnhem Land Jacksonia (Jacksonia arnhemica) belongs to the Fabaceae family within the Jacksonia genus. Arnhem Land Jacksonia is native to the Northern Territory.

Arnhem Land Jacksonia displays a tall, upright tree growth habit, reaching up to 30 ft tall with a spread of approximately 15 ft. Arnhem Land Jacksonia produces small, inconspicuous yellow or white flowers.

Leaf size: approximately 6 inches.

Water a young or newly planted Arnhem Land Jacksonia 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.

Arnhem Land Jacksonia thrives in full sun.

Jacksonia arnhemica tolerates temperatures of 50–85°F. Arnhem Land Jacksonia prefers humidity levels of 40–70%.

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

Feed Arnhem Land Jacksonia 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 and well-draining sandy loam with added organic matter. Avoid low spots where water collects after rain.

Arnhem Land Jacksonia 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.

Arnhem Land Jacksonia can spread to about 15 ft (4.6 m) and reach about 30 ft (9 m) tall. Space plants about 15 ft (4.6 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 Arnhem Land Jacksonia 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.

Arnhem Land Jacksonia 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.

Arnhem Land Jacksonia can be propagated through seeds, softwood cuttings. Similar propagation techniques also apply to pointed jacksonia plant care, which shares the same genus.

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

Arnhem Land Jacksonia is susceptible to aphids, leafhoppers, 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.

Arnhem Land Jacksonia grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Arnhem Land Jacksonia is native to the Northern Territory. In cooler regions, grow Arnhem Land Jacksonia as a houseplant or bring it indoors before the first frost.