About Frost-Free Gardenias
Frost-proof gardenias (Gardenia jasminoides) are a cultivar of gardenia that can tolerate frost conditions and will not lose its flowers. Also known as the common gardenia or cape jasmine, frost-proof gardenias are evergreen shrubs that produce large flowers. Some species cannot tolerate frost, but Gardenia jasminoides retains its petals if a late spring freeze occurs. The frost-proof gardenia was the winner of the 2007 Garden Writers Best Plants Award. Does this Spark an idea?
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Identification
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Depending on the cultivar, gardenias can grow anywhere from 2 to 6 feet in height with a spread of the same size. When healthy, gardenias sport glossy, deep green leaves that can grow to 4 inches long. Their white, waxy flowers have a diameter up to 4 inches and are extremely fragrant. Gardenias begin to flower in May and continue through July. They are hardy up to 20 degrees F and can tolerate a late spring frost.
Conditions
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Frost-proof gardenias grow best in USDA hardiness zones six through nine. Although they prefer full partial shade, they can also grow in full sun. Plant them in a place where there is minimal root competition from trees because gardenias do not grow well if their roots are disturbed. Plant in a place where the soil is moist, well-drained and acidic.
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Care
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Feed your gardenias in mid-March with acidic plant food and then again in June. You could also use blood meal or fish emulsion. This extra boost will encourage your gardenias to produce more flowers and to grow faster. If healthy, your gardenias should grow a foot per year until mature. Prune away dead flowers and unhealthy branches and be sure to water your gardenias regularly.
Uses
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Planting frost-proof gardenias in your garden will add deep green leaves year round and fragrant flowers in the spring and fall. Frost-proof gardenias can also be used as a privacy hedge, foundation plant or a specimen. They are insect and disease resistant, and deer typically stay away from them.
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References
- Photo Credit gardenia image by Pat Lalli from Fotolia.com
