The Calamondin (Calamansi ) tree is a cross between a tangerine and a kumquat, and produces a small, thin-skinned, tart citrus fruit that is great to eat out of hand, or for use as juice, in salads, and for cooking. The fruit is orange, up to two or three inches across, and appears among dark green, glossy foliage. Calamondins can be grown in the ground in USDA Zones 8 – 11, or in a container on a patio or indoors if you are in USDA Zones 4 – 11. Calamondin Trees reach a size of 6 to 8 feet when grown in the ground in a sunny location and within their ideal growing zones. Container-grown Calamondins grow to about 4 to 6 feet in height. Calamansi Trees are represent good luck for the Chinese New Year!