Before soaking and accelerating the germination of seeds, rub them with clean water, and then soak them in warm water at 25-30℃ for 3-5 days. Change the water 1-2 times a day. When the seeds absorb enough water, take them out, mix with fine sand and put them in a container. Cover it with a wet towel, and place it at 25-30 degrees Celsius to accelerate germination. After 5-8 days, the seeds can be sown after they become white.