Averrhoa carambola
Family: Oxalidaceae
Common Name: Carambola

Cultivated throughout the tropics, the origin of this species is uncertain, with opinion divided between Brazil and Malaysia. Introduced into Europe in the late 18th century, it never became popular like some of the exotic fruits brought there around the same time. The tree is a small evergreen, 14 m (46 ft) high, with compound leaves bearing small, purple flowers in short sprays along the branches. Fruits are borne in profusion. They are 8-12 cm (3-5 in) long and ribbed, making five corners which, cut in section, resemble stars. The outer fruit is waxy yellow and contains the yellow flesh. Fruits are eaten fresh or made into drinks, jams and preserves. They have a high content of vitamins A and C. The juice of the fruit removes stains from the hands or clothing.

Cultivation

Outside the subtropics and tropics, grow as a young foliage plant in a warm green-house or conservatory, in pots of soil-based potting compost. Provide a humid atmosphere and shade plants from strong, direct sun. Outdoors grow in sun and well drained, humus-rich soil. Plenty of water needed. Propagate from seed sown in a warm propagating case. Budded trees are best for fruit production.

Climate

Needing high temperature and high humidity, these trees are best suited to the tropics, but may be grown in suitable microclimates in the subtropics. Zone 10.