Isolona zenkeri Plant Care

Isolona zenkeri (Isolona zenkeri) belongs to the Annonaceae family within the Isolona genus. Isolona zenkeri is native to Cameroon, The Republic of the Congo and Gabon.

Isolona zenkeri displays a small to medium-sized tree growth habit, reaching up to 15 ft tall with a spread of approximately 10 ft. Isolona zenkeri produces small, fragrant flowers in clusters.

Leaf size: approximately 6 inches.

Water a young or newly planted Isolona zenkeri 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.

Isolona zenkeri thrives in partial shade to full sun.

Isolona zenkeri tolerates temperatures of 65–85°F. Isolona zenkeri prefers humidity levels of 50–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Rich, well-draining soil with added organic matter like compost or peat moss. Good drainage is essential for Isolona zenkeri to prevent waterlogging, which leads to root rot and fungal issues.

Feed Isolona zenkeri 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 rich, well-draining soil with added organic matter like compost or peat moss. Avoid low spots where water collects after rain.

Isolona zenkeri is suited to USDA Zone 13b.

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.

Isolona zenkeri 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 Isolona zenkeri 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.

Isolona zenkeri 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.

Isolona zenkeri can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to isolona congolana plant care, which shares the same genus.

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

Isolona zenkeri 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.

Isolona zenkeri grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. Isolona zenkeri is native to Cameroon, The Republic of the Congo and Gabon. In cooler regions, grow Isolona zenkeri as a houseplant or bring it indoors before the first frost.