In the case of sunflower seeds, they usually sleep for 20 to 50 days after harvest. During this time, even if the seed germination conditions are adequate, it will not germinate. Dormancy is biologically important. It can keep the seeds “sleeping†and wait until the normal sowing season to germinate. When the seeds mature in the harvest season, even in the event of continuous rain, it is possible to avoid germination on the faceplate. The dormant phenomenon of sunflower seeds will naturally survive the harvest season after the harvest. Http:// Shock Wave Therapy Device,Shock Wave Therapy,Shock Wave Therapy Equipment,Shock Wave Therapy Therapy Machine Puyang Degren Medical Equipment Co., Ltd. , https://www.degrenyuwei.com