Doronicum acaule Plant Care

Doronicum acaule (Arnica acaulis) belongs to the Asteraceae family within the Arnica genus. Doronicum acaule is native to the southeastern and east-central parts of the United States, from Alabama and Florida north to New Jersey and Pennsylvania.

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

Leaf size: approximately 4 inches.

Water a young or newly planted Doronicum acaule 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.

Doronicum acaule thrives in full sun to partial shade.

Arnica acaulis tolerates temperatures of 60–75°F. Doronicum acaule prefers humidity levels of 40–60%.

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

Feed Doronicum acaule 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.

Doronicum acaule is suited to USDA Zone 6a – 9b.

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.

Doronicum acaule 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 Doronicum acaule 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.

Doronicum acaule is hardy down to USDA zone 6a, 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.

Doronicum acaule can be propagated through seeds, division of rhizomes. Similar propagation techniques also apply to flora danica plant care, which shares the same genus.

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

Doronicum acaule 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.

Doronicum acaule grows outdoors in USDA Zone 6a – 9b. It survives winters down to planting zone 6a. Doronicum acaule is native to the southeastern and east-central parts of the United States, from Alabama and Florida north to New Jersey and Pennsylvania.