Oxyacantha alnorum Plant Care

Oxyacantha alnorum (Oxyacantha alnorum) belongs to the Rosaceae family within the Oxyacantha genus. Oxyacantha alnorum is native to northeastern North America.

Oxyacantha alnorum displays a deciduous shrub, upright habit growth habit, reaching up to 6 ft tall with a spread of approximately 4 ft. Oxyacantha alnorum produces clusters of white or pink fragrant flowers.

Leaf size: approximately 3 inches.

Water a young or newly planted Oxyacantha alnorum 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.

Oxyacantha alnorum thrives in full sun to partial shade.

Oxyacantha alnorum tolerates temperatures of 50–80°F. Oxyacantha alnorum prefers humidity levels of 40–70%.

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

Feed Oxyacantha alnorum 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.

Oxyacantha alnorum is suited to USDA Zone 12a.

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.

Oxyacantha alnorum 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 Oxyacantha alnorum 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.

Oxyacantha alnorum is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Oxyacantha alnorum can be propagated through softwood cuttings, hardwood cuttings.

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

Oxyacantha alnorum is susceptible to aphids, caterpillars, sawflies. 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.

Oxyacantha alnorum grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Oxyacantha alnorum is native to northeastern North America. In cooler regions, grow Oxyacantha alnorum as a houseplant or bring it indoors before the first frost.