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Gardenias are a Great Plant for Your Greenhouse

Posted May 15th, 2018 by Robin Nichols in

Common Names: Gardenia, Cape jasmine

Light Needs:  High light, even in winter with at least 4 hours of full sun a day.

Best Temperatures: Between 65-80ºF (18-26ºC)

Water and Humidity Needs:  Keep the soil moist and mist them to raise humidity.

Growing Guidelines: Grow in all-purpose potting mix with added peat moss and sand. Fertilize monthly from spring to fall with acidic fertilizer. Adding coffee grounds to the soil several times a year can help stimulate flower growth.

Common Problems: Spider mites are a common pest. Low temperature drafts can cause leaves to drop. Dry air and too little light may cause buds to wilt.

Propagation: Cuttings from ripe stems with mature wood at the base.

Fun Facts: Gardenias have white or yellow tubular flowers, evergreen leaves and large berrylike fruits containing a sticky orange pulp. Gardenia is a genus of flowering plants in the coffee family, Rubiaceae, native to the tropical and subtropical regions of Africa, Asia, Madagascar and Pacific Islands. They are often rambling plants that form mounds of glossy dark green foliage. There are 142 species have been discovered in the gardenia family and the gardenia flower is the national flower of Pakistan. The gardenia was named after Dr. Alexander Garden, a famous botanist, who was also a zoologist and physician. The fruit of the gardenia is sometimes used in Chinese medicine.

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