2. There are many varieties of cold potato, such as early potato, medium potato and late potato. As the name implies, the planting time of cold potato is different, and the harvest time is also different. Generally speaking, cold potato can be continuously marketed from July to1February. According to different varieties, the earliest time for cold potato to be marketed is July, so it is a summer fruit, and we can harvest it after entering summer. After the summer is over, it will enter autumn. At this time, Chinese potatoes will be on the market. Generally, the maturity time of Chinese potatoes is from August to October. We can buy some cold potatoes at the end of autumn. At this time, the cold potatoes are the sweetest, because the longer he stays underground, the more water he absorbs and the sweeter he tastes.