Nagami Kumquat. Nagami Kumquat is a beautiful citrus tree that is covered each winter in a dense profusion of small orange fruits. Nagami kumquat fruit is small and oval shaped, it is typically more sour than the other varieties. Nagami Kumquat produces extremely fragrant blooms that will fill the air in the heat of summer. Nagami Kumquat is a very cold hardy in winters as low as 20°F. Nagami Kumquat fruit is rich in dietary fiber, minerals, vitamins and anti-oxidants. Kumquats are used in for cooking, preserves and jellies. They are also popular for salads. If wanting a patio orange tree, it requires to be in Zone 4 - 7. If planting outside, requires Zone 8 - 11. (Shipping Only In GA.)