It can be planted in any season, but it can't be planted in an open field when the weather is cold. You can plant it in the greenhouse.

Cabbage has strong adaptability, which is both heat-resistant and cold-resistant. It can be planted in open fields in spring, summer and autumn all over the country, and harvested in autumn in summer sowing in cold areas in the north. In the warm areas of the south, it can be planted mainly in spring and autumn, or it can be replanted.

The cultivation method of cabbage:

1, sowing and seedling raising

After the seeds are germinated, they are sown on seedbeds, and each seedbed can sow 5-6g. Before sowing, water the seedbed once, and cover the seedbed with a layer of shallow soil after the water has completely penetrated. Then you can sow, sowing and sowing requirements are unified, so that the seeds will be more dense and consistent after emergence. After sowing, it will be lightly covered with a layer of soil about 0.5cm. When the seeds grow two or three true leaves, they can be sown when there is a core after emergence.

2. Land preparation and colonization

Select the plot where cruciferous crops were not planted in the previous crop for planting, make a 2-meter-wide border after deep ploughing and fine harrowing, and open a deep ditch. Apply 2000-2500 kilograms of organic fertilizer and 50 kilograms of compound fertilizer per mu. Seedling age is 30-35 days. Sow after 4 pm on cloudy or sunny days. Planting density should be determined according to varieties, and 2800 flat-headed varieties should be planted per mu.

3. Tian Tuan management

The management of water and fertilizer is mainly based on promotion, with emphasis on fertilization in the late stage of clumping and the early stage of filling. Nitrogen fertilizer is the main fertilizer in the early stage, and phosphorus and potassium fertilizer are the main fertilizer in the middle and late stage of pelletizing. Topdressing for 3-4 times, intertillage and weeding in time. Control the watering frequency and quantity in the later stage of pelletizing to avoid cracking.

Step 4 control pests and diseases

The pests of cabbage cultivated in autumn and winter are serious, so attention should be paid to the prevention and control of aphids, Pieris rapae, Plutella xylostella and Pieris rapae.