Roseodendron donnell-smithii Plant Care

Roseodendron donnell-smithii (Roseodendron donnell-smithii) belongs to the Bignoniaceae family within the Roseodendron genus. Roseodendron donnell-smithii is native to Central America and Mexico.

Roseodendron donnell-smithii displays a tall, upright tree growth habit, reaching up to 15 ft tall with a spread of approximately 8 ft. Roseodendron donnell-smithii produces large trumpet-shaped flowers in shades of pink and purple.

Leaf size: approximately 6 inches.

Water a young or newly planted Roseodendron donnell-smithii every 7–10 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.

Roseodendron donnell-smithii thrives in full sun to partial shade.

Roseodendron donnell-smithii tolerates temperatures of 60–85°F. Roseodendron donnell-smithii prefers humidity levels of 40–70%.

Well-draining loamy soil with added compost for nutrients. Good drainage is essential for Roseodendron donnell-smithii to prevent waterlogging, which leads to root rot and fungal issues.

Feed Roseodendron donnell-smithii 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 with added compost for nutrients. Avoid low spots where water collects after rain.

Roseodendron donnell-smithii 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.

Roseodendron donnell-smithii can spread to about 8 ft (2.4 m) and reach about 15 ft (5 m) tall. Space plants about 8 ft (2.4 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 Roseodendron donnell-smithii 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.

Roseodendron donnell-smithii 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.

Roseodendron donnell-smithii can be propagated through seeds, stem cuttings.

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

Roseodendron donnell-smithii 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.

Roseodendron donnell-smithii grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Roseodendron donnell-smithii is native to Central America and Mexico. In cooler regions, grow Roseodendron donnell-smithii as a houseplant or bring it indoors before the first frost.