In areas where temperatures are low and it is difficult to survive the winter safely, greenhouse cultivation is required. Generally, an arched greenhouse with a width of 6 meters, a height of 2.5 meters and a length of 30 meters is used. Construct deep trenches and high borders for planting. In areas with high groundwater levels and heavy soils, the depth of the trenches should be no less than 30 cm. Each shed should be built with 2 to 3 borders. The cultivation density is the same as open field planting, and the cultivation management work is basically the same as open field planting. Cultivation is the same.