Anisacanthus trilobus Plant Care

Anisacanthus trilobus (Anisacanthus trilobus) belongs to the Acanthaceae family within the Anisacanthus genus. Anisacanthus trilobus is native to the Caatinga vegetation and Cerrado vegetation of Brazil, ranging from Tocantins to Piauí and Minas Gerais states.

Anisacanthus trilobus displays an upright, spreading shrub growth habit, reaching up to 3 ft tall with a spread of approximately 4 ft. Anisacanthus trilobus produces tubular flowers in shades of orange, red, or yellow.

Leaf size: approximately 4 inches.

Water a young or newly planted Anisacanthus trilobus 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.

Anisacanthus trilobus thrives in full sun to partial shade.

Anisacanthus trilobus tolerates temperatures of 50–85°F. Anisacanthus trilobus prefers humidity levels of 40–70%.

Well-draining sandy loam with added organic matter. Good drainage is essential for Anisacanthus trilobus to prevent waterlogging, which leads to root rot and fungal issues.

Feed Anisacanthus trilobus 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 sandy loam with added organic matter. Avoid low spots where water collects after rain.

Anisacanthus trilobus is suited to USDA Zone 12a.

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.

Anisacanthus trilobus can spread to about 4 ft (1.2 m) and reach about 3 ft (1 m) tall. Space plants about 4 ft (1.2 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 Anisacanthus trilobus 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.

Anisacanthus trilobus is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Anisacanthus trilobus can be propagated through softwood cuttings, division. Similar propagation techniques also apply to anisacanthus brasiliensis plant care, which shares the same genus.

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

Anisacanthus trilobus 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.

Anisacanthus trilobus grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Anisacanthus trilobus is native to the Caatinga vegetation and Cerrado vegetation of Brazil, ranging from Tocantins to Piauí and Minas Gerais states. In cooler regions, grow Anisacanthus trilobus as a houseplant or bring it indoors before the first frost.