Longan Tree Live Plant Tropical Longan Plant, Grow Indoor Fruit Tree 6-8 Inch Tall 4 Inch PotLongan Tree (Dimocarpus longan) Growing Guide The longan tree is a subtropical to tropical fruit tree, closely related to lychee. It is valued for its sweet, juicy fruit and is more cold tolerant than lychee, but still requires warm growing conditions to fruit well. WHERE IT GROWS BEST USDA Zones 10a 11b (Ideal) South Florida Hawaii Warm coastal areas of Southern California USDA Zone 9b (Possible) Can tolerate light, short frost Requires frost