Isatis indigotica, also known as Potatoes, Solanum melongena and Bulb Cabbage, is a biennial herb in Cruciferae. According to the color of bulb skin, it can be divided into three types: green, green and white, and purple. Early-maturing varieties have short plants and few leaves, which are harvested 50-60 days after planting. The middle and late maturity varieties have strong growth potential and many large leaves, and it takes 80- 100 days from planting to harvesting.

1, soak the selected seeds in warm water at 55℃ 15 minutes for disinfection, soak them for three or four hours after the water temperature naturally cools down, then sow them in loose and fertile soil and cover them with a thin layer of soil. Sprinkle the soil gently with a watering can and put it in a warm place with direct light to keep the soil moist;

2. It is best to cover the seedling box or flowerpot with a layer of dark plastic film. During this period, open the plastic film once or twice a day for ventilation, or make a few small holes in the plastic film, which can effectively speed up the germination. If the temperature is right, you can see the seedlings break through the ground in about ten days;

3. After the seedlings emerge neatly, the plastic film should be removed in time to prevent the seedlings from growing in vain;

4. Keep the flowerpot in a warm and well-lit place and keep the soil slightly moist, so that the seedlings in the environment can grow strong and healthy, laying a solid foundation for future flowering and fruiting.