1. Seedling cultivation and transplanting: Soak kale seeds in warm water at 35-38°C for one night, take them out and put them in nutrient solution to cultivate seedlings. After roots grow, transplant them into soil. Planted in. When transplanting, you need to take soil with you, and plant with a row spacing of 17-20cm and a plant-to-plant spacing of 18-25cm.

2. Light and temperature. Kale is a long-day crop and is not shade-tolerant. However, existing varieties do not have strict requirements on the length of sunlight and require good light during growth and development. The most suitable growth temperature for kale is 25~30℃. The high temperature in summer should not exceed 30℃, and the low temperature should not be lower than 15℃.

3. Water and fertilizer. Kale likes a moist soil environment and is not drought tolerant. Its waterlogging tolerance is slightly stronger than other cabbage vegetables. When raising kale seedlings, use a nutrient solution with good fertility. 10 days after transplanting, apply compound fertilizer once, water thoroughly once, and replenish water 7-10 days later. In summer, you need to water once in the morning and evening. In other seasons, you can water once every other day.

4. Harvesting: When the kale turns dark blue, it can be harvested. Generally, it can be harvested about 70 days after planting, and can be harvested continuously for 40-50 days.