Sunset®: 7-9, 12-16, 18-23
USDA: 9b-10
Frost Tolerance: Hardy to 30° F (-1°C)
Sun Exposure: Light shade in Phoenix
Growth Habits: Evergreen shrub to 3 feet
Watering Needs: Regular water
Propagation: Softwood cuttings with heels in February. Roots at 80° F (27 ° C)
Blooming Habits:
The gardenia flowers are highly fragrant, and make great cut flowers.
Culture:
Gardenias need summer heat to bloom, but in Phoenix, they get burnt easily. Protect them from reflective heat, or from a western exposure. In Phoenix soils, chlorosis can be a problem. Use fertilizer for acid loving plants, and use iron compounds.
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