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Seeding and seedling management 1. Seedbed preparation: The seedbed can be selected in the greenhouse or plastic greenhouse. The seedbed is 1-1.5 meters wide and the length is as needed. The seedbed substrate is preferably 50% humus mixed with 50% of the idyllic soil, and the soil is disinfected to prevent pests and diseases. The seedbed is leveled and the soil particles are finely divided. 2, sowing and management: using the ditching method, the line spacing is 15 cm. The sowing depth is 1-2 cm. After sowing, cover a layer of fine soil, spray water with a fine watering can, and spray water 1-2 times a day to keep the greenhouse temperature 20-25 degrees Celsius. Seedlings began to appear in about 5 days, and the seedlings could be released after about 2 weeks. When the seedlings grow 2-3 leaves, apply a thin mixture of nitrogen and potassium. At the same time, watering, weeding and other management, 7 days after the application of nitrogen and potassium mixed fertilizer。