Zygogynum howeanum Plant Care

Zygogynum howeanum (Zygogynum howeanum) belongs to the Winteraceae family within the Zygogynum genus. Zygogynum howeanum is native to Australia’s subtropical Lord Howe Island in the Tasman Sea.

Zygogynum howeanum displays a small tree or shrub growth habit, reaching up to 6 ft tall with a spread of approximately 4 ft. Zygogynum howeanum produces small, fragrant white or yellow flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Zygogynum howeanum 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.

Zygogynum howeanum thrives in partial shade to full shade. The optimal light range is 100–500 lux. Avoid placing Zygogynum howeanum in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Zygogynum howeanum tolerates temperatures of 60–75°F. Zygogynum howeanum prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Rich, well-draining soil with high organic content. Good drainage is essential for Zygogynum howeanum to prevent waterlogging, which leads to root rot and fungal issues.

Feed Zygogynum howeanum 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 shade and rich, well-draining soil with high organic content. Avoid low spots where water collects after rain.

Zygogynum howeanum 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.

Zygogynum howeanum 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 Zygogynum howeanum 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.

Zygogynum howeanum 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.

Zygogynum howeanum can be propagated through seeds, cuttings. Similar propagation techniques also apply to no synonyms available plant care, which shares the same genus.

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

Zygogynum howeanum is susceptible to aphids, scale insects, mealybugs. 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.

Zygogynum howeanum grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Zygogynum howeanum is native to Australia’s subtropical Lord Howe Island in the Tasman Sea. In cooler regions, grow Zygogynum howeanum as a houseplant or bring it indoors before the first frost.