Answer: The most common gardenia is the G. jasminoides or cape
jasmine. Gardenias require a rich very acid soil, with a pH
of 4.5 to 5. An abundance of moisture is the most important
factor in successful gardenia culture, and providing humidity by sprinkling the leaves each morning will help your gardenia produce her fragrant flowers.
Unfortunately, gardenia is often a disappointment to gardeners because it can be very, very demanding. For flower buds to form and thrive, night temperatures need to be between 60-65F. During the day, temperatures should be 70-75F. A very constant, even temperature is required or buds will drop. Bright light is essential, avoid direct mid-day sun in the summer. Keep the soil moist at all times except winter when watering should be reduced.
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