Gardenia or China flower
The evergreen gardenia or opera flower (Rubiaceae), also known as C. jasminoides is native to China and japan where it grows to a 1.5 in (5 ft) shrub. It has decorative, glossy, dark green leaves and beautiful large, deliciously scented white, often double, that appear in summer. These house plants need warmth but they can be moved outdoors in summer, where they should be placed in a light position but not in direct sun. Gardenias need a lime-free proprietary compost, rich in peat. Water only with lime-free water, moderately in summer and in winter only just enough to prevent the root ball from drying out. Feed weekly with a special acid fertilizer. In winter, gardenias need a lot of light, a temperature of 10-15° C (50-59° F) and high humidity. Cold conditions and water-logging will cause . Cuttings can be taken in summer or spring. Young plants should be pruned regularly, older plants only when necessary.