Round-leaved Swainson-pea Plant Care

Round-leaved Swainson-pea (Swainsona rotunda) belongs to the Fabaceae family within the Swainsona genus. Round-leaved Swainson-pea is native to inland areas of northern Western Australia.

Round-leaved Swainson-pea displays a bushy perennial shrub growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Round-leaved Swainson-pea produces showy pea-like flowers in various colors.

Leaf size: approximately 4 inches.

Water a young or newly planted Round-leaved Swainson-pea every 7–10 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Round-leaved Swainson-pea thrives in full sun to partial shade.

Swainsona rotunda tolerates temperatures of 50–80°F. Round-leaved Swainson-pea prefers humidity levels of 40–70%.

Well-draining sandy loam with added organic matter. Good drainage is essential for Round-leaved Swainson-pea to prevent waterlogging, which leads to root rot and fungal issues.

Feed Round-leaved Swainson-pea every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs 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 sandy loam with added organic matter. Avoid low spots where water collects after rain.

Round-leaved Swainson-pea is suited to USDA Zone 12a.

Plant container-grown or balled-and-burlapped shrubs in spring or early autumn, setting the root flare at soil level, and water well after planting.

Round-leaved Swainson-pea can spread to about 2 ft (0.6 m) and reach about 3 ft (1 m) tall. Space plants about 2 ft (0.6 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 plant spacing calculator.

Prune Round-leaved Swainson-pea 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 shrub in one year.

Round-leaved Swainson-pea 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.

Round-leaved Swainson-pea can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to swainsona acuticarinata plant care, which shares the same genus.

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

Round-leaved Swainson-pea is susceptible to aphids, whiteflies, spider mites. 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.

Round-leaved Swainson-pea grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Round-leaved Swainson-pea is native to inland areas of northern Western Australia. In cooler regions, grow Round-leaved Swainson-pea as a houseplant or bring it indoors before the first frost.