The Kwai Muk is native to China. It is a slow-growing 20-25ft tall, symmetrical, compact canopy without pruning, slender tree that can be grown as an ornamental specimen plant due to its erect growing habit and attractive long slender leaves.
The round fruits have a velvety, brownish, thin, tender skin. The fruit have a diameter of 1.5-2 inches and a weight of 0.5-1.5 oz. Fruit shape is irregular, being globose, ovate, or oblate. The skin is thin and easily broken. The fruit is best when harvested from the tree completely ripe. When mature the pulp is orange-red to red, soft, acid to subacid and of an excellent flavor. The fruit can be seedless or may contain 1 to 7 small pale seeds. The pulp is delicious eaten raw or can be preserved or sun dried. Self pollinating.
The trees are not as cold tolerant as initially thought and are injured by brief drops in temperature to 28°F (-2°C). Mature trees have endured 26°F(-3°) which is similar to a mango or jackfruit.
Trees grow well when maintained on a fertilizer program such as that used for citrus trees in home gardens.