Gardenia Plant Care

Gardenia (Gardenia jasminoides) belongs to the Rubiaceae family within the Gardenia genus. Gardenia is native to Southern China and Japan. Gardenia is also known as Common Gardenia, Cape Jasmine, White Gardenia.

Gardenia displays a compact, bushy growth habit, reaching up to 6 ft tall with a spread of approximately 5 ft. Gardenia produces white, fragrant, solitary inflorescence.

Leaf size: approximately 2 inches.

Water a young or newly planted Gardenia 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.

Gardenia thrives in bright indirect light. Avoid placing Gardenia in direct, harsh sunlight for extended periods, as this can scorch the foliage.

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

Well-draining soil mix. Good drainage is essential for Gardenia to prevent waterlogging, which leads to root rot and fungal issues.

Feed Gardenia every month 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 bright indirect light and well-draining soil mix. Avoid low spots where water collects after rain.

Gardenia is suited to USDA Zone 8a – 11b.

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.

Gardenia can spread to about 5 ft (1.5 m) and reach about 6 ft (2 m) tall. Space plants about 5 ft (1.5 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 Gardenia 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.

Gardenia is hardy down to USDA zone 8a, so once established it can stay outdoors through winter in that zone and warmer ones.

Water deeply in late autumn before the ground freezes, and spread a 5–8 cm (2–3 in) layer of mulch over the root zone, keeping it away from the trunk.

Young and container-grown trees need extra protection: roots in a pot freeze much more easily than roots in the ground.

Gardenia can be propagated through stem cuttings or layering. Similar propagation techniques also apply to gardenia bush plant care, which shares the same genus.

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

Gardenia is susceptible to aphids, whiteflies, scale insects. 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.

Gardenia grows outdoors in USDA Zone 8a – 11b. It survives winters down to planting zone 8a. Gardenia is native to Southern China and Japan.