Pittosporum kirkii Plant Care

Pittosporum kirkii (Pittosporum kirkii) belongs to the Pittosporaceae family within the Pittosporum genus. Pittosporum kirkii is native to New Zealand with a known restricted geographical range in the North Island, extending from the Northland Region to the Whanganui River, in the Manawatū-Whanganui region.

Pittosporum kirkii displays an upright, dense shrub growth habit, reaching up to 8 ft tall with a spread of approximately 6 ft. Pittosporum kirkii produces small, fragrant, creamy white blooms in clusters.

Leaf size: approximately 4 inches.

Water a young or newly planted Pittosporum kirkii 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.

Pittosporum kirkii thrives in full sun to partial shade.

Pittosporum kirkii tolerates temperatures of 50–80°F. Pittosporum kirkii prefers humidity levels of 40–70%.

Well-draining sandy loam with added organic matter for moisture retention. Good drainage is essential for Pittosporum kirkii to prevent waterlogging, which leads to root rot and fungal issues.

Feed Pittosporum kirkii 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 sandy loam with added organic matter for moisture retention. Avoid low spots where water collects after rain.

Pittosporum kirkii 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.

Pittosporum kirkii can spread to about 6 ft (1.8 m) and reach about 8 ft (2 m) tall. Space plants about 6 ft (1.8 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 Pittosporum kirkii 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.

Pittosporum kirkii 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.

Pittosporum kirkii can be propagated through seeds, semi-hardwood cuttings. Similar propagation techniques also apply to pittosporum cornifolium plant care, which shares the same genus.

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

Pittosporum kirkii 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.

Pittosporum kirkii grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Pittosporum kirkii is native to New Zealand with a known restricted geographical range in the North Island, extending from the Northland Region to the Whanganui River, in the Manawatū-Whanganui region. In cooler regions, grow Pittosporum kirkii as a houseplant or bring it indoors before the first frost.