Cerastium subtriflorum Plant Care

Cerastium subtriflorum (Cerastium subtriflorum) belongs to the Caryophyllaceae family within the Cerastium genus.

Cerastium subtriflorum displays a low mat-forming groundcover growth habit, reaching up to 0.5 ft tall with a spread of approximately 1.5 ft. Cerastium subtriflorum produces small white or pink flowers in clusters.

Leaf size: approximately 1 inches.

Water a young or newly planted Cerastium subtriflorum 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.

Cerastium subtriflorum thrives in full sun to partial shade.

Cerastium subtriflorum tolerates temperatures of 50–75°F. Cerastium subtriflorum prefers humidity levels of 40–60%.

Well-draining sandy loam with added organic matter. Good drainage is essential for Cerastium subtriflorum to prevent waterlogging, which leads to root rot and fungal issues.

Choose a spot with full sun to partial shade and well-draining sandy loam with added organic matter. Avoid low spots where water collects after rain.

Cerastium subtriflorum 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.

Cerastium subtriflorum can spread to about 2 ft (0.5 m) and reach about 1 ft (0 m) tall. Space plants about 2 ft (0.5 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 Cerastium subtriflorum 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.

Cerastium subtriflorum 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.

Cerastium subtriflorum can be propagated through seeds, division of clumps. Similar propagation techniques also apply to small-flowered mouse-ear plant care, which shares the same genus.

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

Cerastium subtriflorum is susceptible to aphids, spider mites, slugs. 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.

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