Greenland Cochlearia Plant Care

Greenland Cochlearia (Cochlearia groenlandica) belongs to the Brassicaceae family within the Cochlearia genus.

Greenland Cochlearia displays a low rosette, spreading growth habit, reaching up to 0.5 ft tall with a spread of approximately 1 ft. Greenland Cochlearia produces small white or yellow flowers in clusters.

Leaf size: approximately 2 inches.

Water a young or newly planted Greenland Cochlearia 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.

Greenland Cochlearia thrives in full sun to partial shade.

Cochlearia groenlandica tolerates temperatures of 45–75°F. Greenland Cochlearia prefers humidity levels of 40–70%.

Well-draining loamy soil with added compost for nutrients. Good drainage is essential for Greenland Cochlearia to prevent waterlogging, which leads to root rot and fungal issues.

Feed Greenland Cochlearia 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 loamy soil with added compost for nutrients. Avoid low spots where water collects after rain.

Greenland Cochlearia is suited to USDA Zone 11b.

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.

Greenland Cochlearia can spread to about 1 ft (0.3 m) and reach about 1 ft (0 m) tall. Space plants about 1 ft (0.3 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 Greenland Cochlearia 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.

Greenland Cochlearia is frost-tender (hardy to USDA zone 11). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Greenland Cochlearia can be propagated through seeds, division of clumps. Similar propagation techniques also apply to english scurvygrass plant care, which shares the same genus.

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Greenland Cochlearia is susceptible to aphids, cabbage worms, flea beetles. 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.

Greenland Cochlearia grows outdoors in USDA Zone 11b. It survives winters down to planting zone 11b. In cooler regions, grow Greenland Cochlearia as a houseplant or bring it indoors before the first frost.