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Photos: Wikimedia Commons
Gardenia
Care at a glance
Light
Water
Humidity
Temperature
Growth
Soil
Fertiliser
Pet safety
About this plant
Native to southern China and Japan, gardenias love warmth, humidity and acidic soil. They flower mainly from late spring through summer. Compact varieties such as 'Radicans' make great ground covers and pot plants.
Best spots
Part-shaded balconies, courtyards, entryways, hedges and pots near seating so you can enjoy the scent.
Plant facts
| Botanical name | Gardenia jasminoides |
| Family | Rubiaceae |
| Origin | Southern China & Japan |
| Plant type | Evergreen shrub |
| Mature size | 0.3–1.5 m |
| Growth rate | Moderate |
| Foliage | Glossy dark green leaves |
| Flowers | Fragrant creamy white |
| Toxicity | Toxic to pets |
| Propagation | Semi-hardwood cuttings |
Seasonal care calendar
Based on Southern Hemisphere seasons.
Troubleshooting
| Yellow leaves | Soil not acidic enough, or cold. Use acid fertiliser and Epsom salts. |
| Buds drop | Dry soil, temperature swings or low humidity. |
| Black sooty leaves | Scale or aphids. Treat with horticultural oil. |
| Brown flowers | Rain damage or age. |
| Few flowers | Too much shade or wrong pruning time. |
Common questions
Why are my gardenia leaves yellow?
Usually alkaline soil or magnesium deficiency. Feed with an acid fertiliser.
When should I prune?
After flowering in late summer or autumn.
Can it grow indoors?
It's challenging indoors; it's happiest outdoors.
How do I get more flowers?
Consistent moisture, acid fertiliser and morning sun.
