This genus in the madder family (Rubiaceae) consists of around 250 species, the majority found in the tropics of Africa and Asia. Mostly evergreen shrubs or small trees, they have opposite or whorled, simple, shiny, deep green leaves. The fragrant, large, tubular to funnel-shaped flowers can be white or yellow and are produced singly or in semi-double and double forms along or at the ends of branches. The fruit is a leathery or fleshy berry with many seeds. Gardenias are attractive landscape subjects and make wonderful container plants. The beautiful flowers have made this genus popular in cultivation throughout the world and a favorite with florists; they are popular flowers for corsages and buttonholes. The flowers of some species are used to perfume tea.
CULTIVATION
Most species perform best in a well-drained, humus-rich, acidic soil. When in growth, mulch with good quality compost and fertilezer, with adequate summer watering. In cool climates grow in a heated greenhouse, as gardenias are frost tender. Propagate from seed or leafy tip or half-hardened cuttings in late spring and summer.
Top Tip
Contrary to their elegant appearance, gardenias are quite resilient evergreen shrubs. They can tolerate sun or part-shade, but do not do well in desert climates.
CULTIVATION
Most species perform best in a well-drained, humus-rich, acidic soil. When in growth, mulch with good quality compost and fertilezer, with adequate summer watering. In cool climates grow in a heated greenhouse, as gardenias are frost tender. Propagate from seed or leafy tip or half-hardened cuttings in late spring and summer.
Top Tip
Contrary to their elegant appearance, gardenias are quite resilient evergreen shrubs. They can tolerate sun or part-shade, but do not do well in desert climates.
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