1, select the species suitable for cultivation. Most of the varieties of this vegetable are imported from abroad. In our planting area, purple cabbage No.1 is mainly cultivated. It is a medium-mature variety with huge shape and great growth potential. The leaf surface can reach 65 to 70 cm, and there are 18 to 20 leaves outside. The color of the leaves is purple. The lobe ball is round. One can weigh four to six kilograms, one acre of land can produce six thousand to seven thousand kilograms, and it takes about eighty or ninety days from planting to harvest. It can be stored for a long time and has strong disease resistance, so it is suitable for planting in spring and summer.

2. Cultivated land. Purple cabbage has a strong ability to absorb nutrients, so when cultivating land, you can dig as deep as possible and make a border of 1.2 meters after leveling the land. About 10,000 Jin of organic fertilizer, 50-60 Jin of phosphate fertilizer, 60-80 Jin of urea and 40-60 Jin of potash fertilizer are applied to an acre. Purple cabbage can't be short of calcium. Lack of calcium will burn the heart, so it can be supplemented with a certain amount of calcium fertilizer.

3. Sow seeds and cultivate seedlings. Most of them are planted into seedlings and then moved to the soil for planting. It is planted by sowing seeds, with 50 to 100 grams of seeds per acre. After emergence, the temperature in cotyledon stage is about 15 to 20 degrees Celsius, and that in true leaf stage is about 18 to 22 degrees Celsius. Five to seven days before planting, it is not necessary to control the temperature too much, just close to room temperature. Purple cabbage sown in spring is planted in the land in late March and early April. Planting at the water's edge can raise the surface temperature and slow down the seedlings. When planting this vegetable in autumn, it should be transplanted first and then watered, which is convenient for moisture conservation.

4. Management of seedlings. Before sowing seeds, the seedbed must be watered permeable, and it should also be watered permeable when fixing seedlings and dividing seedlings. In other periods, watering is not needed, so as to avoid damaging roots.

5. Later watering management. After watering the seedling-delaying water once or twice, you can enter the squatting stage, during which you can water it again for two or four times. Deep tillage for the first time can conserve moisture and promote the growth of roots; The shallow intertillage in the middle stage of rosette can be combined with soil cultivation to promote stem shrinkage and rooting, which is convenient for heading. Twenty days of squatting seedling stage. At the end of the period, the purple cabbage will be watered a lot when it is heading. If it is heading, it will be watered a lot as long as the ground is dry.

6. Harvest. When the bulbs of purple cabbage are tightly closed, they can be harvested. Just cut the roots and get rid of the outer leaves and broken leaves.