Delavay Osmanthus Plant Care

Delavay Osmanthus (Osmanthus delavayi) belongs to the Oleaceae family within the Osmanthus genus. Delavay Osmanthus is native to the Guizhou, Sichuan and Yunnan regions of southern China, and widely cultivated as an ornamental in temperate and subtropical zones else. Delavay Osmanthus is also known as Delavay's Osmanthus, Fragrant Olive.

Delavay Osmanthus displays an upright, dense shrub growth habit, reaching up to 10 ft tall with a spread of approximately 6 ft. Delavay Osmanthus produces small, highly fragrant white or orange blossoms.

Leaf size: approximately 3 inches.

Water a young or newly planted Delavay Osmanthus 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.

Delavay Osmanthus thrives in full sun to partial shade.

Osmanthus delavayi tolerates temperatures of 50–85°F. Delavay Osmanthus prefers humidity levels of 40–70%.

Well-draining, slightly acidic soil with good organic content. Good drainage is essential for Delavay Osmanthus to prevent waterlogging, which leads to root rot and fungal issues.

Feed Delavay Osmanthus 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, slightly acidic soil with good organic content. Avoid low spots where water collects after rain.

Delavay Osmanthus 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.

Delavay Osmanthus can spread to about 6 ft (1.8 m) and reach about 10 ft (3 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 Delavay Osmanthus 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.

Delavay Osmanthus 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.

Delavay Osmanthus can be propagated through softwood cuttings, semi-hardwood cuttings, seeds. Similar propagation techniques also apply to tough osmanthus plant care, which shares the same genus.

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

Delavay Osmanthus is susceptible to scale insects, aphids, 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.

Delavay Osmanthus grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Delavay Osmanthus is native to the Guizhou, Sichuan and Yunnan regions of southern China, and widely cultivated as an ornamental in temperate and subtropical zones else. In cooler regions, grow Delavay Osmanthus as a houseplant or bring it indoors before the first frost.