Dwarf kumquat trees are some of the most unique citrus varieties available. They can be maintained at heights of between 5 and 6 feet when pruned yearly. Kumquats are native to Asia and grow small, oval shaped or round fruit that is traditionally eaten whole, or used in jelly, salads, and liqueurs. The skin is sweet, the flesh is tart, and the kumquat is quite cold hardy for a citrus tree. Both the Dwarf Meiwa Sweet Kumquat Tree and the Dwarf Nagami Sour Kumquat Tree are popular for their small stature and high quality fruit.