Crown Flower Plant Care

Crown Flower (Calotropis gigantea) belongs to the Apocynaceae family within the Calotropis genus. Crown Flower is native to Cambodia, Vietnam, Bangladesh, Indonesia, Malaysia, Philippines,Thailand, Sri Lanka, India, China, Pakistan, and Nepal. Crown Flower is also known as Giant Milkweed, Sodom Apple.

Crown Flower displays an upright, branching shrub growth habit, reaching up to 6 ft tall with a spread of approximately 4 ft. Crown Flower produces large clusters of showy, star-shaped flowers in white or purple.

Leaf size: approximately 8 inches.

Water a young or newly planted Crown Flower every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Crown Flower thrives in full sun to partial shade.

Calotropis gigantea tolerates temperatures of 65–85°F. Crown Flower prefers humidity levels of 40–70%.

Well-draining sandy soil mix with good aeration. Good drainage is essential for Crown Flower to prevent waterlogging, which leads to root rot and fungal issues.

Feed Crown Flower every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees 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 soil mix with good aeration. Avoid low spots where water collects after rain.

Crown Flower is suited to USDA Zone 13b.

Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.

Crown Flower can spread to about 4 ft (1.2 m) and reach about 6 ft (2 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 tree spacing calculator.

Prune Crown Flower 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 tree in one year.

Crown Flower 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.

Crown Flower can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to sodom apple plant care, which shares the same genus.

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Crown Flower is susceptible to aphids, spider mites, 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.

Crown Flower grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Crown Flower is native to Cambodia, Vietnam, Bangladesh, Indonesia, Malaysia, Philippines,Thailand, Sri Lanka, India, China, Pakistan, and Nepal. In cooler regions, grow Crown Flower as a houseplant or bring it indoors before the first frost.