Cobbe's Allophylus Plant Care

Cobbe's Allophylus (Allophylus cobbe) belongs to the Sapindaceae family within the Allophylus genus. Cobbe's Allophylus is also known as Redwood Sorrel, Bladdernut.

Cobbe's Allophylus displays an upright, spreading shrub growth habit, reaching up to 6 ft tall with a spread of approximately 4 ft. Cobbe's Allophylus produces small clusters of white or pink flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Cobbe's Allophylus 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.

Cobbe's Allophylus thrives in partial shade to full sun.

Allophylus cobbe tolerates temperatures of 60–85°F. Cobbe's Allophylus prefers humidity levels of 40–70%.

Well-draining loamy soil with added organic matter for moisture retention. Good drainage is essential for Cobbe's Allophylus to prevent waterlogging, which leads to root rot and fungal issues.

Feed Cobbe's Allophylus 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 partial shade to full sun and well-draining loamy soil with added organic matter for moisture retention. Avoid low spots where water collects after rain.

Cobbe's Allophylus 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.

Cobbe's Allophylus 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 Cobbe's Allophylus 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.

Cobbe's Allophylus 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.

Cobbe's Allophylus can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to allophylus aldabricus plant care, which shares the same genus.

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

Cobbe's Allophylus is susceptible to aphids, scale insects, spider mites. 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.

Cobbe's Allophylus grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. In cooler regions, grow Cobbe's Allophylus as a houseplant or bring it indoors before the first frost.