Buckwheat is an annual herb plant with a maturity period of 75 days and two seasons in the north. Stems erect, 30-90 cm tall, upper branched, green or red, with longitudinal ribs, glabrous or with papillae along longitudinal ribs on one side. Leaves triangular or ovate-triangular, 2.5-7 cm long, 2-5 cm wide, apex acuminate, base heart-shaped, ...