Green-bracted onion Plant Care

Green-bracted onion (Romulea viridibracteata) belongs to the Iridaceae family within the Romulea genus. Green-bracted onion is native to Pakhuis Pass in the Western Cape Province of South Africa. Green-bracted onion is also known as Green-leaved romulea.

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

Leaf size: approximately 6 inches.

Water a young or newly planted Green-bracted onion 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.

Green-bracted onion thrives in full sun to partial shade.

Romulea viridibracteata tolerates temperatures of 50–80°F. Green-bracted onion prefers humidity levels of 40–60%.

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

Feed Green-bracted onion 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.

Green-bracted onion 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.

Green-bracted onion 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 Green-bracted onion 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.

Green-bracted onion 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.

Green-bracted onion 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.

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Green-bracted onion 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.

Green-bracted onion grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Green-bracted onion is native to Pakhuis Pass in the Western Cape Province of South Africa. In cooler regions, grow Green-bracted onion as a houseplant or bring it indoors before the first frost.