Periwinkle can be propagated by seeds and cuttings. Production is mainly based on seed propagation. The seeds begin to mature gradually after July. When the seed coat turns black, they should be picked in batches, dried and threshed. The seeds have inconsistent maturity and cannot be harvested in one go. Seeds stored at room temperature for 2 years still have a germination rate of 67%. Can be broadcast directly or transplanted from seedlings.

(1) Seedling transplantation: Sow seeds from March to April. If the seeds are sown too early, the temperature will be low and the seeds will not germinate; if they are too late, the growth period will be shortened and the yield will be reduced. For planting in the north, film seedlings can be used. There are two types: strip sowing and broadcast sowing. The drills are sown in furrows with a row spacing of 25 cm, covered with soil about 1 cm thick, and covered with grass for watering and moisture retention. The sower means spreading the seeds evenly on the border surface. After the seedlings emerge, gradually remove the grass cover and pay attention to regular watering to keep the soil moist. Weeding and thinning should also be done promptly. When the seedlings are 10 to 15 centimeters tall, transplant them with soil on a cloudy and rainy day. Open holes at a row spacing of 25 cm x 20 cm. Apply decomposed manure or turf mud as base fertilizer in the holes. After mixing with the soil, plant 1 to 1 seedling in each hole. 2 plants, cover with soil, lightly press, and water.

(2) After selecting the soil before sowing for live broadcast, apply enough base fertilizer and use 1,500 to 2,000 kilograms of decomposed organic fertilizer per 667 meters, and then plow and rake to make a fine and smooth border (it can also be used during planting) Then apply basal fertilizer) to the hole to make a 1.3-meter-wide sorghum border, and open drainage ditches around it before sowing. Make shallow holes with a spacing of 25 cm × 20 cm between rows and plants, and sow 3 to 5 seeds in each hole. After sowing, lightly suppress and water the seedlings. After the seedlings emerge, pay attention to loosening the soil and weeding. When the seedlings are 10 cm high, set the seedlings and leave 1 to 2 strong seedlings in each hole.

(3) Field management Generally, after planting or direct seeding, when the seedling height is 15-20 cm and around July, weeding and cultivating are done once each time. If there are any missing seedlings, they must be transplanted and replenished in time. Before the lockdown, cultivating should be combined with soil cultivation. Stop cultivating after the row is closed; fertilize for the first time after the transplanted seedlings survive or after the direct-seeded seedlings are established, and then topdress once every other month, each time using 1000 to 1500 kilograms of human excrement or 5 to 6 kilograms of urea per 667 m2. Or 15 to 20 kilograms of diammonium phosphate, apply in trenches, cover with soil and water after application; pay attention to watering when the land is dry, and pay attention to drainage in the rainy season to avoid root rot; in order to promote multiple side branches and increase yield, it is also necessary to Topping 2 to 3 times. When 3 to 4 pairs of true leaves appear, perform the first topping. Then, depending on the growth of the side branches, topping 1 to 2 more times, and stop topping in mid-August.

(4) Harvest in September to October, choose sunny days, harvest the above-ground parts with a sickle, transport them back to the drying field, remove the lignified hard stems, cut them into 6 cm long segments, or dry them.