Sowing methods include: (1) direct seeding. Because Shuidong mustard grows fast, the growth period is short, leafy mustard takes root slowly, and it is hot and rainy in summer and autumn, which is not conducive to the recovery of root growth after transplantation. Direct seeding is often used. However, seedling management is easily affected by natural disasters, which is time-consuming and laborious. (2) Seedling transplanting: select fertile loam land with convenient irrigation and drainage, and apply sufficient base fertilizer. Because the seeds are small, the nursery land should be carefully arranged and harrowed. Ditching and ridging the border surface according to1.2-1.5m. After sowing, the border surface is covered with black shading net to reduce the soil temperature and reduce the erosion caused by heavy rain. After the seedlings are unearthed, the sunshade net should be uncovered in time. When the seedlings grow 2-3 true leaves, they should be gradually thinned by weeding. In order to prevent root injury during transplanting and improve the survival rate, it is best to use greenhouse for factory seedling raising in conditional production bases. Some vegetable markets have applied this seedling raising method to large-scale short-term leafy vegetable production and achieved very remarkable results, especially the large-scale production of Shuidong mustard. This is conducive to saving seeds, labor and drugs, and is convenient for management, especially for preventing disasters such as high temperature in summer and autumn and typhoon and rainstorm, and shortening the field production cycle. Shuidong mustard has strong precocity. When the seventh big leaf is reached 32-35 days after sowing, it has already begun to worry. (At this time, the leaves bend slightly to the center and the petioles bend inward. At this time, the quality of vegetables is good and the yield is high, which is a suitable harvest period. The harvesting standard (product standard) is "four leaves with one heart", that is, four leaves are harvested under the heart and tied into a bundle according to the weight of 1kg for sale.