Ageratum littorale Plant Care

Ageratum littorale (Ageratum littorale) belongs to the Asteraceae family within the Ageratum genus. Ageratum littorale is native to Florida, the common name referring to Cape Sable inside Everglades National Park.

Ageratum littorale displays a compact, mounding habit growth habit, reaching up to 0.5 ft tall with a spread of approximately 0.5 ft. Ageratum littorale produces small fluffy flowers in blue, pink, or white clusters.

Leaf size: approximately 2 inches.

Water a young or newly planted Ageratum littorale every 3–5 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 littorale thrives in full sun to partial shade.

Ageratum littorale tolerates temperatures of 60–80°F. Ageratum littorale prefers humidity levels of 40–60%.

Well-draining, fertile soil with added organic matter. Good drainage is essential for Ageratum littorale to prevent waterlogging, which leads to root rot and fungal issues.

Feed Ageratum littorale every 4 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, fertile soil with added organic matter. Avoid low spots where water collects after rain.

Ageratum littorale 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.

Ageratum littorale can spread to about 1 ft (0.2 m) and reach about 1 ft (0 m) tall. Space plants about 1 ft (0.2 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 littorale 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 littorale 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.

Ageratum littorale can be propagated through seeds. Similar propagation techniques also apply to tropical ageratum plant care, which shares the same genus.

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

Ageratum littorale is susceptible to aphids, 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 littorale grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Ageratum littorale is native to Florida, the common name referring to Cape Sable inside Everglades National Park. In cooler regions, grow Ageratum littorale as a houseplant or bring it indoors before the first frost.