Austral Winter Cress Plant Care

Austral Winter Cress (Barbarea australis) belongs to the Brassicaceae family within the Barbarea genus.

Austral Winter Cress displays a low rosette, spreading growth habit, reaching up to 0.5 ft tall with a spread of approximately 0.5 ft. Austral Winter Cress produces small yellow flowers in clusters.

Leaf size: approximately 2 inches.

Water a young or newly planted Austral Winter Cress every 3–5 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.

Austral Winter Cress thrives in full sun to partial shade.

Barbarea australis tolerates temperatures of 50–75°F. Austral Winter Cress prefers humidity levels of 40–70%.

Moist, well-draining soil rich in organic matter. Good drainage is essential for Austral Winter Cress to prevent waterlogging, which leads to root rot and fungal issues.

Feed Austral Winter Cress 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 moist, well-draining soil rich in organic matter. Avoid low spots where water collects after rain.

Austral Winter Cress 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.

Austral Winter Cress 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 Austral Winter Cress 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.

Austral Winter Cress 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.

Austral Winter Cress can be propagated through seeds. Similar propagation techniques also apply to intermediate winter cress plant care, which shares the same genus.

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

Austral Winter Cress is susceptible to aphids, flea beetles, cabbage worms. 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.

Austral Winter Cress grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Austral Winter Cress as a houseplant or bring it indoors before the first frost.