Seed retention of Glehnia littoralis: When collecting the root system, select the annual and biennial strong seedlings with excellent varieties and no diseases and insect pests as sowing seedlings, timely ditch or dig holes for oblique planting according to the row spacing of 25-30 cm, carefully manage them, turn green and bolting in the first ten days of April every year, leaving only the fruit bowls on the main stem and removing the small fruit bowls on the side branches to concentrate nutrition and promote grain fullness.

Harvest the fruit in batches when it is yellow and brown in mid-July every year, otherwise the seeds will fall off easily. Cut the sequence and fruit, dry in time, and lay the seeds.

Dry seeds can be used for sowing in autumn and winter. Spring sowing should be stored in low temperature and wet sand. Before winter, the seeds should be soaked and mixed with three times of wet sand, buried in outdoor pits, and taken out for sowing the next spring. If the field can strengthen management and fertilization, the seeds can be harvested continuously for 6 ~ 10 years.