Cabbage was originally distributed in North China, China, and widely cultivated in China. Cabbage is hardy and likes cold climate, so it is suitable for growing in cold season. If it is cultivated in high temperature season, it is prone to diseases and pests, or the quality is poor and the yield is low, so it is not suitable for cultivation in summer.
Its resistance to low temperature is very strong. After the temperature reaches -3℃, if the temperature can be gradually raised, the growth can also be resumed, but after reaching -8℃, if the temperature continues to drop to about-1 1℃, the normal growth cannot be resumed and it will suffer from freezing injury.
Extended data:
Chinese cabbage seedlings should be watered lightly and poured frequently to keep moist. Irrigate intermittently in the rosette stage, see dry and wet, and practice seedlings properly. The requirement of water content is high when the ball is formed, and furrow irrigation can be used when the soil is dry.
Irrigation should be carried out in the evening or after the ground temperature decreases at night, and it should be poured slowly, so as not to fill the border. After water seeps into the soil, the remaining water should be discharged as soon as possible. Make sure there is no water in the ditch, no water on the border and no water shortage in the roots. From the end of rosette stage to the middle stage of heading, keeping the soil moist is one of the keys to strive for high yield of Chinese cabbage.
It is an inevitable rule for Chinese cabbage to grow and develop, and there is no need to bind leaves. However, in case of severe cold in late-maturing varieties, in order to promote good heading and delay harvesting and supply, the outer leaves are lifted up after light snow and tied with straw.