California Bush Mallow Plant Care

California Bush Mallow (Malacothamnus aboriginum) belongs to the Malvaceae family within the Malacothamnus genus. California Bush Mallow is native to the southern Coastal Ranges of California, primarily in the southern half of the Diablo Range and the Gabilan Range.

California Bush Mallow displays an upright, branching shrub growth habit, reaching up to 4 ft tall with a spread of approximately 3 ft. California Bush Mallow produces small, delicate pink to purple bell-shaped flowers in clusters.

Leaf size: approximately 2 inches.

Water a young or newly planted California Bush Mallow every 7–14 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.

California Bush Mallow thrives in full sun to partial shade.

Malacothamnus aboriginum tolerates temperatures of 50–85°F. California Bush Mallow prefers humidity levels of 40–70%.

Well-draining sandy soil mix with added organic matter for nutrients. Good drainage is essential for California Bush Mallow to prevent waterlogging, which leads to root rot and fungal issues.

Feed California Bush Mallow 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 mix with added organic matter for nutrients. Avoid low spots where water collects after rain.

California Bush Mallow 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.

California Bush Mallow can spread to about 3 ft (0.9 m) and reach about 4 ft (1 m) tall. Space plants about 3 ft (0.9 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 California Bush Mallow 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.

California Bush Mallow 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.

California Bush Mallow can be propagated through softwood cuttings, seeds. Similar propagation techniques also apply to abbott's bushmallow plant care, which shares the same genus.

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

California Bush Mallow is susceptible to aphids, spider mites, whiteflies. 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.

California Bush Mallow grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. California Bush Mallow is native to the southern Coastal Ranges of California, primarily in the southern half of the Diablo Range and the Gabilan Range. In cooler regions, grow California Bush Mallow as a houseplant or bring it indoors before the first frost.