Stachystemon polyandrus Plant Care

Stachystemon polyandrus (Stachystemon polyandrus) belongs to the Picrodendraceae family within the Stachystemon genus. Stachystemon polyandrus is native to the southwest of Western Australia.

Stachystemon polyandrus displays an upright, branching shrub growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Stachystemon polyandrus produces small clusters of white or pink flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Stachystemon polyandrus every 7–14 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.

Stachystemon polyandrus thrives in partial to full sun.

Stachystemon polyandrus tolerates temperatures of 60–80°F. Stachystemon polyandrus prefers humidity levels of 40–70%.

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

Feed Stachystemon polyandrus 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 partial to full sun and well-draining sandy loam with added organic matter. Avoid low spots where water collects after rain.

Stachystemon polyandrus is suited to USDA Zone 13a.

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.

Stachystemon polyandrus 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 Stachystemon polyandrus 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.

Stachystemon polyandrus 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.

Stachystemon polyandrus can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to axillary stachystemon plant care, which shares the same genus.

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

Stachystemon polyandrus is susceptible to aphids, spider mites, 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.

Stachystemon polyandrus grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Stachystemon polyandrus is native to the southwest of Western Australia. In cooler regions, grow Stachystemon polyandrus as a houseplant or bring it indoors before the first frost.