Betony Leaf Arnica Plant Care

Betony Leaf Arnica (Arnica betonicifolia) belongs to the Asteraceae family within the Arnica genus. Betony Leaf Arnica is native to western North America from Alaska east to Northwest Territories and south to Mono County, California, and Taos County, New Mexico. Betony Leaf Arnica is also known as Mountain Betony.

Betony Leaf Arnica displays a low rosette, clumping growth habit, reaching up to 1.5 ft tall with a spread of approximately 1 ft. Betony Leaf Arnica produces bright yellow daisy-like flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Betony Leaf Arnica 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.

Betony Leaf Arnica thrives in full sun to partial shade.

Arnica betonicifolia tolerates temperatures of 60–75°F. Betony Leaf Arnica prefers humidity levels of 40–60%.

Well-draining, loamy soil with good organic content. Good drainage is essential for Betony Leaf Arnica to prevent waterlogging, which leads to root rot and fungal issues.

Feed Betony Leaf Arnica 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 good organic content. Avoid low spots where water collects after rain.

Betony Leaf Arnica is suited to USDA Zone 13a.

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.

Betony Leaf Arnica can spread to about 1 ft (0.3 m) and reach about 2 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 Betony Leaf Arnica 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.

Betony Leaf Arnica is frost-tender (hardy to USDA zone 13). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Betony Leaf Arnica can be propagated through seeds, division of rhizomes. Similar propagation techniques also apply to doronicum acaule plant care, which shares the same genus.

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

Betony Leaf Arnica is susceptible to aphids, whiteflies, spider mites. 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.

Betony Leaf Arnica grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Betony Leaf Arnica is native to western North America from Alaska east to Northwest Territories and south to Mono County, California, and Taos County, New Mexico. In cooler regions, grow Betony Leaf Arnica as a houseplant or bring it indoors before the first frost.