Two-edged Romulea Plant Care

Two-edged Romulea (Romulea anceps) belongs to the Iridaceae family within the Romulea genus. Two-edged Romulea is native to South Africa.

Two-edged Romulea displays a low rosette, clumping growth habit, reaching up to 0.5 ft tall with a spread of approximately 0.5 ft. Two-edged Romulea produces small star-shaped flowers in various colors.

Leaf size: approximately 6 inches.

Water a young or newly planted Two-edged Romulea 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.

Two-edged Romulea thrives in full sun to partial shade.

Romulea anceps tolerates temperatures of 50–80°F. Two-edged Romulea prefers humidity levels of 40–60%.

Well-draining sandy soil with added organic matter like compost. Good drainage is essential for Two-edged Romulea to prevent waterlogging, which leads to root rot and fungal issues.

Feed Two-edged Romulea 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 soil with added organic matter like compost. Avoid low spots where water collects after rain.

Two-edged Romulea is suited to USDA Zone 9a – 10b.

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.

Two-edged Romulea can spread to about 1 ft (0.2 m) and reach about 1 ft (0 m) tall. Space plants about 1 ft (0.2 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 Two-edged Romulea 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.

Two-edged Romulea is frost-tender (hardy to USDA zone 9). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Two-edged Romulea can be propagated through by seeds or division of offsets. Similar propagation techniques also apply to columna's romulea plant care, which shares the same genus.

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

Two-edged Romulea is susceptible to aphids, thrips, 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.

Two-edged Romulea grows outdoors in USDA Zone 9a – 10b. It survives winters down to planting zone 9a. Two-edged Romulea is native to South Africa. In cooler regions, grow Two-edged Romulea as a houseplant or bring it indoors before the first frost.