The north and northwest are suitable for spring ploughing. For example, Harbin can raise seedlings in greenhouses in mid-February and sow in mid-May once a year. North China can plant two crops a year.
Before planting, apply base fertilizer, deeply loosen the soil, and then rake it flat to make the border. The width of the border is 90~ 100 cm, planted in 4 rows, and the spacing between plants is 20~30 cm. When the planting density is high, the fleshy roots are small. Planting should not be too deep, and it is advisable to level the roots with the border, otherwise the seedlings will die easily.
Planting should be carried out in sunny morning, which is beneficial to slow down seedlings. The planting period in Harbin is in the first half of May, and it can be planted 10~ 15 days in advance with a small arch shed.