Zieria robertsiorum Plant Care

Zieria robertsiorum (Zieria robertsiorum) belongs to the Rutaceae family within the Zieria genus. Zieria robertsiorum is native to the wet tropics of far north-eastern Queensland.

Zieria robertsiorum displays a low, spreading shrub growth habit, reaching up to 2 ft tall with a spread of approximately 3 ft. Zieria robertsiorum produces small clusters of white or pink flowers.

Leaf size: approximately 2 inches.

Water a young or newly planted Zieria robertsiorum 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.

Zieria robertsiorum thrives in partial shade to full sun.

Zieria robertsiorum tolerates temperatures of 50–80°F. Zieria robertsiorum prefers humidity levels of 40–70%.

Well-draining sandy soil mix with good organic content. Good drainage is essential for Zieria robertsiorum to prevent waterlogging, which leads to root rot and fungal issues.

Feed Zieria robertsiorum 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 shade to full sun and well-draining sandy soil mix with good organic content. Avoid low spots where water collects after rain.

Zieria robertsiorum 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.

Zieria robertsiorum can spread to about 3 ft (0.9 m) and reach about 2 ft (1 m) tall. Space plants about 3 ft (0.9 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 Zieria robertsiorum 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.

Zieria robertsiorum 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.

Zieria robertsiorum can be propagated through softwood cuttings, seeds. Similar propagation techniques also apply to floyd's zieria plant care, which shares the same genus.

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

Zieria robertsiorum is susceptible to aphids, scale insects, 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.

Zieria robertsiorum grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Zieria robertsiorum is native to the wet tropics of far north-eastern Queensland. In cooler regions, grow Zieria robertsiorum as a houseplant or bring it indoors before the first frost.