1, the density of watermelon in greenhouse should make full use of the space in greenhouse, and generally stereo cultivation can be used. The varieties with weak growth potential can plant 1500 ~ 1800 plants per 667m2, and the varieties with vigorous growth and large leaf shape can plant 1200 ~ 1500 plants per 667m2. Double vine pruning is the best way to promote grafting and seedling raising, with strong adaptability and high yield.

2. When creeping cultivation is adopted, double vines are used for pruning, and 65,438+0,000 ~ 65,438+0,200 plants can be planted per 667m2. Pay attention to selecting watermelon varieties with short internodes, stable growth and low temperature and weak light tolerance. The planting time should be from 9: 00 a.m. to 3: 00 p.m. on sunny days to ensure that the soil temperature is conducive to delaying seedling emergence. When planting, water the bottom first, and then sow the seedlings. Be careful not to spill the soil. After planting the seedlings, water can be added in time to seal the holes.