1. In late April or early May, one-year-old seedlings with fat leaves, dark green, thick and long vines and no diseases and insect pests were selected from the nursery land and planted on the border of the whole land as seed land. Before planting, dig holes according to the row spacing of 20 cm× 30 cm, and the hole depth is 20 cm. After applying decomposed manure, fireclay ash and calcium superphosphate mixed fertilizer to each hole, the seedlings will be planted again. Seedling should be planted with overnight soil to avoid damage to the root system, with each hole 1 plant. Increase fertilizer and water management in the future. On the basis of general field management, 1 time of phosphorus, potassium fertilizer or compound fertilizer is applied during flower bud differentiation in late May of each year, and it is added with water to meet its demand for water and fertilizer and promote it to form more buds. Harvest the fruits in time when they are ripe. After the seeds are dried, they should be packed in paper bags and hung in a ventilated and dry place for sowing next spring.
2. harvesting and processing. (1) Polygonum multiflorum Thunb. The seeds of Polygonum multiflorum Thunb. propagate 3 years after planting, and the asexual seeds propagate 2 years after planting, and are dug after the stems and leaves turn yellow in autumn and winter. Remove the vines first, because the roots are deeply buried, they must be turned over from a place far away from the rhizosphere before they can be pried out, shaken off the soil and transported back for processing. After being shipped back, clean the soil, cut large pieces into 1.5 cm thick slices, and the small ones can be directly dried or dried without cutting.
(2) Polygonum multiflorum Thunb. Harvest 1 time every autumn, bundle them into small bundles, and directly dry them in the sun or in the shade, which will become a commodity.
Polygonum multiflorum Thunb. is the best one with solid weight and sufficient powder. Polygonum multiflorum Thunb. is better with uniform thickness and purple skin color.