Madras Thorn Plant Care

Madras Thorn (Pithecellobium dulce) belongs to the Fabaceae family within the Pithecellobium genus. Madras Thorn is native to the Pacific Coast and adjacent highlands of Mexico, Central America, and northern South America. Madras Thorn is also known as Monkey Pod, Black-bead, Sweet Tamarind.

Madras Thorn displays a tall tree, spreading canopy growth habit, reaching up to 30 ft tall with a spread of approximately 20 ft. Madras Thorn produces small, fragrant white flowers in clusters.

Leaf size: approximately 6 inches.

Water a young or newly planted Madras Thorn 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.

Madras Thorn thrives in full sun to partial shade.

Pithecellobium dulce tolerates temperatures of 60–85°F. Madras Thorn prefers humidity levels of 40–70%.

Well-draining loamy soil mix with added organic matter for nutrients. Good drainage is essential for Madras Thorn to prevent waterlogging, which leads to root rot and fungal issues.

Feed Madras Thorn 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 loamy soil mix with added organic matter for nutrients. Avoid low spots where water collects after rain.

Madras Thorn is suited to USDA Zone 13a.

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.

Madras Thorn can spread to about 20 ft (6.1 m) and reach about 30 ft (9 m) tall. Space plants about 20 ft (6.1 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 Madras Thorn 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.

Madras Thorn 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.

Madras Thorn can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to pithecellobium johansenii plant care, which shares the same genus.

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Madras Thorn is susceptible to aphids, scale insects, caterpillars. 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.

Madras Thorn grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Madras Thorn is native to the Pacific Coast and adjacent highlands of Mexico, Central America, and northern South America. In cooler regions, grow Madras Thorn as a houseplant or bring it indoors before the first frost.