Litchi trees like high temperature and humidity and sunshine. Its heredity requires that the temperature of flower bud differentiation is relatively low, but the lowest temperature is -2 ~-4℃, so they will suffer from freezing injury. It is sunny and warm in flowering period, and no dry heat is the most favorable. Too low humidity, continuous rain, dry and hot weather or strong north wind are not conducive to flowering and pollination.

Litchi in China is mainly distributed in the range of north latitude 18-29 degrees, with the most cultivated in Guangdong, followed by Fujian and Guangxi, and a few cultivated in Sichuan, Yunnan, Guizhou and Taiwan Province provinces. Southeast Asia is also cultivated, and Africa, America and Oceania have introduced records.

Extended data:

The main cultivars of litchi are March Red, Round Branch, Black Leaf, Hu Aizhi, Guiwei, Glutinous Rice Paste, Justin, Zhu Lan, Chenzi, Gualv, Crystal Ball, Feizixiao and White Sugar Poppy.

Among them, Guiwei and glutinous rice paste are the best varieties and the choice of fresh food, while Guaqing is a precious and hard-to-find variety. "Luogang Guiwei", "Bicun glutinous rice paste" and "Zengcheng Gualv" are known as "Three Unique Litchi". Huiyang town is rich in cinnamon, and glutinous rice paste is delicious and sweet.

Pruning young litchi trees requires that young litchi trees can cultivate a trunk with a height of 30-40 cm and 3-4 evenly distributed main branches, and the planting angle is appropriate, so the pruning targets are: cross branches, over-dense branches, weak branches and flowering spikes that are not allowed to bear fruit.