Early-maturing varieties: the plant has medium growth potential, small leaves, early root expansion and short growth period. The root tuber is oblate or spindle-shaped, with thin skin and few fibers. The weight of a single root is 0.4 ~ 1 kg, and it is eaten fresh or fried. At present, the varieties used are: Ping Huang sweet potato in Guizhou, Suining sweet potato in Sichuan, Mumashan sweet potato in Chengdu, Malay in Taiwan Province, Shage in Shunde, Guangdong and so on.
Late-maturing species: plants have strong growth potential, long growth period and late maturity of tuberous roots. The root tuber is flat spindle-shaped or cone-shaped, with thick skin, many fibers, high starch content and little water. Single weight 1 ~ 1.5 kg, and the maximum can reach more than 5 kg. Suitable for processing and grinding. Commonly used varieties are: Oryza Glutinosa in Zhanjiang, Guangdong, Lagerstroemia indica in the suburbs of Guangzhou, and Castanea henryi in Taiwan Province Province.