Island croton Plant Care

Island croton (Croton insularis) belongs to the Euphorbiaceae family within the Croton genus. Island croton is native to New Caledonia and Vanuatu. Island croton is also known as Caribbean croton.

Island croton displays an upright, bushy shrub growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Island croton produces inconspicuous flowers; grown for its colorful, variegated leaves.

Leaf size: approximately 6 inches.

Water a young or newly planted Island croton 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.

Island croton thrives in bright indirect light. Avoid placing Island croton in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Croton insularis tolerates temperatures of 65–85°F. Island croton prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Well-draining, fertile soil with added perlite for improved drainage. Good drainage is essential for Island croton to prevent waterlogging, which leads to root rot and fungal issues.

Feed Island croton 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 bright indirect light and well-draining, fertile soil with added perlite for improved drainage. Avoid low spots where water collects after rain.

Island croton is suited to USDA Zone 10a – 12b.

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.

Island croton can spread to about 2 ft (0.6 m) and reach about 3 ft (1 m) tall. Space plants about 2 ft (0.6 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 Island croton 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.

Island croton 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.

Island croton can be propagated through stem cuttings, air layering. Similar propagation techniques also apply to hance's croton plant care, which shares the same genus.

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

Island croton is susceptible to spider mites, mealybugs, scale insects. 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.

Island croton grows outdoors in USDA Zone 10a – 12b. It survives winters down to planting zone 10a. Island croton is native to New Caledonia and Vanuatu. In cooler regions, grow Island croton as a houseplant or bring it indoors before the first frost.