Detailed Explanation of Key Techniques for Growing Cabbage Outdoors in Spring

Different types of cabbage have different planting times and methods, and growing cabbage outdoors in spring also involves certain techniques. Let's take a look together.

Techniques for Growing Cabbage Outdoors in Spring

1. To grow cabbage in spring, we need to choose cold-resistant and disease-resistant early-maturing varieties for seedling preparation. The sowing time is between late December and early to mid-January, mostly using solar greenhouse seedling cultivation or improved cold-frame seedling cultivation. The planting density is about 4,000 plants per mu. The seedling plot we choose should be fertile, and we should water it thoroughly. After scattering the seeds evenly into the soil, cover them well with fine soil.

2. Generally, transplanting begins in February and March when it starts to get warm. At this time, the temperature should reach above 5°C. Before transplanting, dig furrows with a row spacing of 50 cm in the shed so the seedlings can be planted into the soil. Plant the sprouted, leafy seedlings together with their soil blocks into the furrows in order, and water them well.

3. After transplanting, strengthen temperature management in the shed and pay attention to cold protection and warmth measures for the plants. During colder periods, cover the surroundings with straw mats, and do not ventilate during the seedling recovery period so as to raise the shed temperature, with an average daytime temperature of 26°C and nighttime 11-15°C; after seedling recovery, lower the temperature to restrain seedling growth for about 7-10 days, with daytime 15-20°C and nighttime 12-14°C. In the early growth stage, begin ventilation when the air temperature in the shed exceeds 20°C; when the minimum nighttime temperature in the shed stabilizes above 10°C, remove the small arch shed inside.

4. After transplanting, pay attention to the water supply for the plants and water them in time. At the same time, carry out topdressing in the half-month furrow after transplanting, mainly applying ammonium nitrate, about 10 kg per mu. During this growth period, observe the growth condition, and when the heads begin to form, apply diammonium phosphate, about 15 kg per mu.

5. Do a good job in pest and disease control and weed management.

Once you have mastered the techniques for growing cabbage outdoors in spring and carefully carry out maintenance work, you can harvest firm cabbage heads.