Meiwa Sweet Kumquat is a round fruit, sweet in flavor, ripens in November to May, cold hardy, compact growth habit.
Nagami Sour Kumquat
Citrus x mitis 'Nagami'
Nagami Sour Kumquat is an oval shaped fruit, skin sweet with tart flesh, ripens November to May, cold hardy.
Calamondin
Citrus mitis
Calamondin is a small depressed, deep orange fruit, loose skin & segmented, very acidic, orange flesh, very sour fruit, ripens November to April, cold hardy.