When will the northern soybeans be planted?

Generally, northern soybeans are sown in spring, and it is more suitable to plant them around Tomb-Sweeping Day in spring. As the old saying goes, it is because the environmental climate of this solar term is compared with the growth of soybeans before and after Tomb-Sweeping Day. Both temperature and air humidity are beneficial to seed germination. Before planting, germination must be accelerated before sowing.