Mexican Calabash Plant Care

Mexican Calabash (Crescentia alata) belongs to the Bignoniaceae family within the Crescentia genus. Mexican Calabash is native to Mexico, Central America south to Costa Rica. Mexican Calabash is also known as Jicaro, Calabash Tree.

Mexican Calabash displays a small to medium-sized tree growth habit, reaching up to 15 ft tall with a spread of approximately 10 ft. Mexican Calabash produces large, showy bell-shaped flowers in shades of yellow or orange.

Leaf size: approximately 6 inches.

Water a young or newly planted Mexican Calabash 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.

Mexican Calabash thrives in full sun to partial shade.

Crescentia alata tolerates temperatures of 60–85°F. Mexican Calabash prefers humidity levels of 50–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

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

Feed Mexican Calabash 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 added organic matter for nutrients. Avoid low spots where water collects after rain.

Mexican Calabash is suited to USDA Zone 10b – 12b.

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.

Mexican Calabash can spread to about 10 ft (3 m) and reach about 15 ft (5 m) tall. Space plants about 10 ft (3 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 Mexican Calabash 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.

Mexican Calabash 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.

Mexican Calabash can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to calabash tree plant care, which shares the same genus.

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Mexican Calabash is susceptible to aphids, 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.

Mexican Calabash grows outdoors in USDA Zone 10b – 12b. It survives winters down to planting zone 10b. Mexican Calabash is native to Mexico, Central America south to Costa Rica. In cooler regions, grow Mexican Calabash as a houseplant or bring it indoors before the first frost.