1, planting time in spring: sow after thawing the soil in early spring, and supply it as shallots before the hot summer, or harvest it as dried shallots or furrow onions in the same year after planting. It can also be used as a horny onion or as a seed plant for seed retention in winter.

2. Planting time in summer: It is usually planted from late July to early August, so it is also called spring onion. The plants were larger when overwintering that year. It is easy to complete the vernalization process, germinate early and bolting and flowering soon in the next spring. Generally, it will be listed after receiving the scallion.

3. Welsh onion seeds are small, the seed coat is firm and thick, cotyledons are unearthed, the seedlings grow slowly and the seedling stage is long. In order to shorten the land occupation time and facilitate management, seedlings are transplanted. Seedbed should not be replanted. After the previous crop is harvested, deep ploughing and fertilization are carried out, and generally a high border with width (furrow) 1.4 meters is made. The seedbed should be carefully arranged, the bed surface should be infiltrated with water before sowing, and new seeds should be used for sowing, and the seed consumption per mu of field should be 75-100g. After sowing, cover 2 cm with soil, and then cover with straw or film to increase temperature and moisture and speed up emergence.