1. Thinning and reasonable dense planting: After the true leaves of the seedlings unfold, time should be taken to remove the dense seedlings and weak seedlings. The second thinning and planting of seedlings can be carried out at the 3-leaf stage (as shown below). And combined with seeding. Generally, the distance between early-maturing seedlings is 10-13 cm, that of mid-maturing varieties is 13-16 cm, and that of late-maturing varieties is 16-17 cm. For those who use seedling transplanting, plant the seedlings when they have 4 true leaves. When planting, it is appropriate for the cotyledons to be even with the edge of the border. The spacing between rows can be appropriately wider than for direct seeding. The transplanting age of seedlings in summer and autumn is 18 to 22 days. It lasts 25 to 30 days in autumn and winter. If there are weeds, cultivating and weeding should be carried out in time, mainly combined with thinning.

2. Fertilization: Top dressing should follow the principles of frequent application, early application, and thin application. It should be light in the early stage and heavy in the middle and late stages. Generally, quick-acting nitrogen fertilizers are mainly used, and phosphorus and potassium fertilizers are applied appropriately. When the first true leaves of the seedlings expand, they should be topdressed once with thin manure or 3 to 4 kilograms of urea per acre to lift the seedlings; when the seedlings have 3 true leaves, they should be combined with thinning and topdressing once with seedling cultivation. For transplants, thin fertilizer is usually applied once every 2 to 3 days when the plant develops new roots. After that, quick-acting fertilizer can be applied once every 5 to 7 days. Generally, 5 to 10 kilograms of urea and urea can be used per acre. Mix and apply 10 to 20 kilograms of compound fertilizer. When the plant is budding, top dressing should be applied again, taking care to avoid fertilizer falling on the buds to avoid rotten buds. After the main sprouts are harvested, if the plants with side sprouts still need to be harvested, heavy fertilizer should be applied again after most of the main sprouts are harvested to promote the development of side sprouts.

3. Pour water: Cabbage has higher requirements for moisture conditions, but it should not accumulate water. Generally, water should be sprayed once in the morning and once in the evening on sunny days to keep the soil moist. If new roots of the seedlings have not grown after transplanting, and the sunlight is relatively strong at noon, you can add another noon water spray from 11:00 to 12:00 in the morning to moisten the leaves and borders; if there is a north wind, , When the relative humidity is low, you can pour more water. In humid weather, you should spray less water to avoid water accumulation in the border.

4. Harvesting: When the height of the vegetable sprouts is equal to or close to the height of the tops of the plant leaves (commonly known as flush flowers), it is the appropriate harvesting period and should be harvested in time. Its harvesting standards depend on different markets and needs. Generally put on the market for sale, the appropriate harvesting height is 20 to 25 centimeters