Gardenia magnifica

Cultivation

Gardenias need bright light, but not strong sun, high humidity and consistently moist, ericaceous compost. They prefer 21–24°C (70–75°F), with slightly cooler night-time and winter temperatures, but always above 16°C (60°F). They can also be grown outside in the warmest summer months in a sheltered spot in partial shade. Gardenias can’t tolerate waterlogged or very dry compost. They will not like a hot, dry atmosphere, strong summer sun or deep shade. Plants are tender, so must be kept indoors over winter. They dislike large temperature fluctuations, which can cause the flower buds to drop

Propagation

Gardenias are easy to grow from cuttings. It’s a good idea to take cuttings annually, as flowering tends to reduce after a few years, so plants need replacing. Take: softwood cuttings in late winter or early spring, and semi-ripe cuttings in summer – heel cuttings are often especially successful. Once rooted, move plants into individual pots of ericaceous compost. Re-pot annually as they grow, to ensure the roots don’t become congested

Suggested planting locations and garden types

• City and courtyard gardens
• Houseplants
• Patio and container plants
• Sub-tropical
• Conservatory and greenhouse

Pruning

Keep gardenias in good shape by lightly pruning in February or March – see our guide to light pruning

Pests

Check plants regularly for sap-feeding insects, including red spider mites, mealybugs, scale insects and aphids

Diseases

May be susceptible to powdery mildews in dry conditions, root rot and fungal or bacterial leaf spots