Freeze the tubers of potatoes and then slowly reduce them. Then squeeze the juice and soak the tomato seeds in the potato juice overnight. The next day, a thick, lint-free cloth is added to the juice, and the soaked seeds are loosely placed on top so that the seeds are not in contact with each other, and then covered with a plastic film to prevent drying, but the ventilation must be maintained. Then place it in a warm place but not warm it. After the seeds germinate, they are inserted into the soil for nursery. Using this method, germination can mature 2-3 weeks earlier than common sprouted tomatoes.