1, the efficacy and function of perilla frutescens. Perilla frutescens can disperse exterior cold and sweat strongly. It is used for exterior syndromes such as aversion to cold, fever and anhidrosis. It is often used with ginger. For exterior syndrome of qi stagnation, it can be combined with Cyperus rotundus and Chenpi. Perilla leaves have wide circulation of qi and are used for qi stagnation of spleen and stomach, chest tightness and nausea. Perilla leaf is a delicious condiment, which is widely used in Wuchuan area of Zhanjiang in southern China. People often cook with its leaves, and its delicacy is often compared to clams. Originated in China, mainly distributed in India, Myanmar, Japan, North Korea, South Korea, Indonesia and Russia. There are wild species and cultivated species in North China, Central China, South China, Southwest China and Taiwan Province Province of China.

2. Planting method and time of perilla frutescens. Generally, the seeds are sown before and after Tomb-Sweeping Day, and they are drilled (the row spacing is 40cm to form a shallow ditch with a width of 10cm and a depth of 3cm, and the seeds are evenly sown in the ditch) or burrowed (the holes are dug with a row spacing of 25-30cm and a plant spacing of 25cm). Seedling transplanting: evenly spread seeds into the ditch on the whole seedbed, plant 2-3 strong seedlings in each hole after planting, finalize the design of the finished product, cover the soil and water. Daily management: loosen the soil and raise seedlings, timely topdressing and reasonable irrigation and drainage.