Buckwheat is a plant crop and is cultivated mainly for its grains. It is usually grown over the summer months and the plant is harvested when they are around two to four feet in height. The plants take around two months to mature and once they are, they are stacked to dry. The dried plants are threshed and the hard outer shell is removed. The remaining grains are then dried completely so that they don't go rancid. They are then ground along with the outer bran which is high in fiber and other nutrients. The bran turns the resulting buckwheat flour into rich brown coloured flour, with dark flecks.