1. Seedling raising time
It is recommended to raise watermelon seedlings from mid-March to early April every year. Because there is more rain during this period and the temperature is slowly rising, it is more suitable for seed germination.
2. Seedling raising methods 1. For seed treatment, it is recommended to use seeds with short growth period, disease resistance, cold tolerance and good quality. Place the purchased seeds in the sun to dry for about 4 hours. Then soak it in warm water of 60 degrees Celsius for 8-12 hours, take it out and drain the water. 2. Soil selection: Watermelon has relatively high soil requirements. It is recommended to choose soil that is loose, moist, fertile and has not been planted in the past 3-5 years. 3. Seed sowing: Put the processed watermelon seeds in nutrient pots, and then arrange them neatly in the seedbed dug in advance. Just put 1-2 seeds in each nutrient pot. After placing it, you need to build a small shed and cover it with a film. You also need to cover the nutrient bowl with a layer of mulch to keep it warm. When the watermelons emerge, the mulch can be removed. 4. Seedbed management: When the temperature changes greatly, it is necessary to cover the seedbed with a straw curtain to keep it warm. Before the seeds have emerged, the shed cannot be opened for ventilation. When the watermelon seedlings emerge, proper ventilation is required. When the seedlings grow to 4-7 cm, they need to be hardened. Ventilation is required at night during this period.