Kumquat (Fortunella japonica syn. Citrus japonica), sometimes spelled cumquat or comquot, is a small, citrus fruit that grows in climates too cool for other citrus plants. The fruit is sweet and tart at the same time and is eaten without removing the peel. If you are interested in trying your hand at growing kumquat trees, you should gather as much kumquat tree info as possible to avoid any kumquat tree problems later down the road. Kumquat Tree Info Kumquats grow on evergreen trees and are native to China. They reach heights of 8 to 15 feet (2 to 4.5 m.) and have a vase-like or rounded canopy. In spring, you’ll be treated to showy, fragrant white flowers. The trees are self-fertile, so you’ll only need one to produce fruit.