Common buckwheat originated in central and western China and was brought to Europe in the Middle Ages. It is cultivated for its grain-like seeds which are rich in carbohydrates, protein, and minerals. Major producers include Russia, China, and the US. Buckwheat thrives in cool, moist climates and grows best in light, medium-textured soils. It has a short growing period and is susceptible to lodging in heavy rain or wind. The plant's triangular seeds, which resemble beech nuts, give it its name.