Buried 3-4 cm underground, the soil thickness is generally not less than 12 cm. When sowing, if the covering soil thickness is insufficient, the soil shall be raised 1 ~ 2 times with the growth of seedlings after emergence. The soil cover is too thin, the ground temperature changes sharply, and the stolons easily escape from the ground. Potatoes like cold and cool, and they like low-temperature crops. The formation and growth of underground potato requires a loose, breathable, cool and moist soil environment. When tuber is used for asexual propagation, seed potato can germinate and grow at soil temperature of 5 ~ 8 degrees Celsius, and the optimum temperature is 15 ~ 20 degrees Celsius. The suitable temperature for the growth and flowering of plant stems and leaves is 16 to 22 degrees Celsius. The optimum temperature for tuber formation at night is 10 ~ 13℃, and it forms slowly when it is higher than 20℃.

Potato growth cycle: dormancy, germination, seedling, emergence,