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Gardenia /ɡɑɹˈdinjə/

Common name: Gardenia · Cape jasmine

Gardenia is a genus of evergreen shrubs in the coffee family, Rubiaceae, native to tropical and subtropical regions of Africa, Asia, and the Pacific. They are famous for their creamy white, intensely fragrant flowers and glossy dark-green leaves. Gardenias are popular as ornamental shrubs and as cut flowers, but can be demanding to grow.

Care summary

Sun Bright light; morning sun, afternoon shade
Water Keep consistently moist, high humidity
Soil Acidic (pH 5.0–6.5), rich, well-draining
Hardiness Zones 8–11
Mature height 0.5–2.5 m (2–8 ft)
Pet safe Mildly toxic to cats and dogs

Fun facts

  • Gardenia flowers are so fragrant that a single bloom can perfume an entire room.
  • The genus was named in honor of Scottish-American naturalist Alexander Garden.
  • Gardenias are notoriously fussy — sudden changes in temperature or light cause buds to drop.

Common problems

    • Feed with an acid-loving plant fertilizer
    • Apply chelated iron to the soil
    • Water with rainwater, not hard tap
    • Keep night temperatures cool and steady
    • Avoid moving budded plants around
    • Keep soil evenly moist, never dry
    • Treat the underlying pest infestation first
    • Wipe mold off leaves gently
    • Spray pests with horticultural oil
    • Give bright light with gentle morning sun
    • Feed with high-potash fertilizer in summer