1、 Preparation before sowing

Select the mature and plump seeds newly born in that year, wash the seeds with clean water, and soak them in alkaline water prepared with warm water for two days. The amount of water during soaking is less than that of the seeds. After two days, scrub the oil on the seed coat repeatedly until its surface turns gray white, then take out the seeds, wash the alkali solution on the seed coat with clean water, and then mix in the plant ash for sowing

2、 Sowing method

Select the sandy soil with fertile soil and good drainage. The seedbed for sowing should be located in the sunny and leeward position. Sort out the land before sowing, dig a pit about 30 cm deep, put the seeds, pour an appropriate amount of water into the pit to wet the soil, and then cover the soil. Keep the soil moist often, and seedlings will grow in about 10 days