Ageratum album Plant Care

Ageratum album (Carelia conyzoides) belongs to the Asteraceae family within the Carelia genus. Ageratum album is native to Tropical America, especially Brazil. Ageratum album is also known as Ageratum arsenei, Ageratum brachystephanum, Ageratum ciliare.

Ageratum album displays a low rosette, spreading ground cover growth habit, reaching up to 0.5 ft tall with a spread of approximately 1 ft. Ageratum album produces small daisy-like flowers in various colors.

Leaf size: approximately 3 inches.

Water a young or newly planted Ageratum album 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.

Ageratum album thrives in full sun to partial shade.

Carelia conyzoides tolerates temperatures of 60–75°F. Ageratum album prefers humidity levels of 40–60%.

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

Feed Ageratum album 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.

Ageratum album is suited to USDA Zone 10a – 11b.

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.

Ageratum album can spread to about 1 ft (0.3 m) and reach about 1 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 Ageratum album 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.

Ageratum album is frost-tender (hardy to USDA zone 10). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Ageratum album can be propagated through seeds, division of root ball.

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Ageratum album 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.

Ageratum album grows outdoors in USDA Zone 10a – 11b. It survives winters down to planting zone 10a. Ageratum album is native to Tropical America, especially Brazil. In cooler regions, grow Ageratum album as a houseplant or bring it indoors before the first frost.