The planting time of Qingkoubai is from March to April. The method is that the suitable growth temperature is between and 2 degrees Celsius, and the growth state will reach the best between 16 and 23 degrees Celsius. The suitable sowing time of green cabbage is generally from late March to early April, and it can be sown at 15-22℃ according to the temperature change in spring. It is planted in a greenhouse in the north, and can be sown and raised in late February. Spring cabbage cultivated with plastic film in the open field can be sown and raised in a small arch shed in early March.