Arrowleaf mallow Plant Care

Arrowleaf mallow (Malvella sagittifolia) belongs to the Malvaceae family within the Malvella genus. Arrowleaf mallow is native to North America. Arrowleaf mallow is also known as Arrow-leaved malva.

Arrowleaf mallow displays an upright, branching shrub growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Arrowleaf mallow produces showy, colorful blooms in shades of pink, purple, or white.

Leaf size: approximately 6 inches.

Water a young or newly planted Arrowleaf mallow 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.

Arrowleaf mallow thrives in full sun to partial shade.

Malvella sagittifolia tolerates temperatures of 65–80°F. Arrowleaf mallow prefers humidity levels of 40–60%.

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

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

Arrowleaf mallow is suited to USDA Zone 8a – 10b.

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.

Arrowleaf mallow can spread to about 2 ft (0.6 m) and reach about 3 ft (1 m) tall. Space plants about 2 ft (0.6 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 Arrowleaf 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.

Arrowleaf mallow is hardy down to USDA zone 8a, so once established it can stay outdoors through winter in that zone and warmer ones.

Water deeply in late autumn before the ground freezes, and spread a 5–8 cm (2–3 in) layer of mulch over the root zone, keeping it away from the trunk.

Young and container-grown shrubs need extra protection: roots in a pot freeze much more easily than roots in the ground.

Arrowleaf mallow can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to alkali mallow plant care, which shares the same genus.

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

Arrowleaf 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.

Arrowleaf mallow grows outdoors in USDA Zone 8a – 10b. It survives winters down to planting zone 8a. Arrowleaf mallow is native to North America.