Introduced into the United States in about 1850, the kumquat is now a popular citrus fruit grown in South Florida. The Marumi is commonly used along drives where it makes a round headed tree which is covered in the winter with brilliant yellow fruit. The Nagami is used extensively as a ornamental and to dress up gift boxes. Although frequently used as an ornament, this small orange colored fruit is excellent for edible garnishes and makes a wonderful marmalade or jelly.
Kumquats are rich in potassium and low in calories.
They contain only a trace of fat, 3.1g carbohydrate and 15.5g water per fruit. Avoid fruit that is wrinkled, dull in appearance or moldy. Fruit should be pressed to determine that they are firm, like baby mandarins, not soft wet. Because of their thin skin, they spoil more rapidly than oranges. If they are to be used within a few days, kumquats may be stored at room temperature.