Twice. According to the query plant network shows, in Taiwan, China, there is a kind of lychee is called "Fan Lychee", due to the long fruiting period, May to June blossom, June to November results, can be produced twice a year, high yield, good flavor. Sen Lychee is also known as foreign Polo, foreign pineapple, Sen Pear, Sakka fruit, Sakka, etc., for the Sen Lychee family, Sen Lychee genus, deciduous small trees.