1. Sowing date: Generally, sowing is from July to late September, and the best sowing date is around the summer heat in late August. Early sowing date, difficult seedling raising, many dead plants after planting, low yield, spicy moss or bitter taste; Delaying sowing date leads to less dead seedlings, but if it is too late, the harvest period will be shortened, the harvest times will be reduced and the yield will be affected.
2. Seedling management: deep ploughing and leveling the seedbed, and sowing 1-2g per square meter of seedbed. In order to control seedling diseases, 50 grams of 75% chlorothalonil wettable powder can be mixed with about 50 kilograms of fine soil, with 1/3 as the base and 2/3 medicinal soil as the seed coating. Keep the soil moist before emergence. In case of high temperature and dry weather after emergence, water it every evening, and pay attention to prevent aphids, yellow striped beetle and diamondback moth. The seedling age of very early-maturing varieties is 20-24 days. After 24 days, bolting may occur in seedbed or before rosette leaves grow after planting. The seedling age of medium-mature varieties is 25 days, and no full-moon seedlings are planted. Only late-maturing varieties can plant full-moon seedlings.
3. Carefully prepare the soil and apply foot fertilizer: the plot for planting red cabbage moss should be prepared at the latest 10 days before planting, so as to bask in the sun. Usually plow and rake twice, and plow and rake again in a few days. Generally, furrow irrigation should be adopted, that is, the furrow should be in 1- 1.2 m (inclusive), with one furrow and two rows, and the furrow of early-maturing varieties can be narrower. Apply plantar fertilizer before planting, and apply 2500 kg of high-quality farmyard manure or compound fertilizer 100 kg every 667㎡.
4. Planting: water the seedbed the day before planting to get the seedlings. When planting, it is best to take seedlings with soil. If you can't take them, try to damage the roots as little as possible. Don't plant the seedlings too deep to avoid covering them. Water them while planting. It is best to irrigate one field at a time after sowing, but only by immersion irrigation, not by flooding irrigation. Very early-maturing varieties have a narrow row of 35-40 cm, and early and middle-maturing varieties have a narrow row of 40 cm, with a spacing of 30-35 cm. If there is early moss before and after planting, the main moss can be removed, nitrogen fertilizer can be applied appropriately, and urea 15kg/667㎡ can be applied in conjunction with irrigation to raise seedlings.