Digging planting ditch: Generally, the depth of ditching is onion height-soil height-1/4 onion height. 1/4 The height of the green onion is the part of the green onion above the soil and below the pentagonal green onion leaves. Before ditching, you should first know the approximate onion height of the selected onion variety. Trench (row) spacing is generally 80 ~ 100 cm. When borrowing soil, the width of borrowing soil is 1/3 row spacing and the depth is 1/2 ditching depth.
Fertilizing and scarifying ditch: after the planting ditch is excavated, apply decomposed organic fertilizer and quick-acting chemical fertilizer at the bottom of the ditch to scarify the bottom soil of the ditch, so that the soil and fertilizer are fully mixed.
Planting: Before seedling raising, fully wet the surface of seedbed with appropriate amount of water. Shake the soil out of the uprooted seedlings, remove the sick plants, and then pile the seedlings in three layers. Green onions are usually planted with water. First, fill the planting ditch with water. After the water seeps down, people stand on the back of the ridge and insert onions, the depth of which should not exceed five forks.
High-onion varieties, the general row spacing is 80 ~ 100 cm, the plant spacing is 4 ~ 5 cm, and the yield per mu is 18000 ~ 22000 plants. Short onion varieties generally have a row spacing of 50-70 cm, a plant spacing of 3-4 cm, and a yield of about 25,000 plants per mu.