The primary product of ginger is the rhizome. Ginger is a flowering plant whose underground stem or rhizome is widely used as a spice and a folk medicine. The rhizome is the part of the ginger plant that is harvested and used in cooking or for its medicinal properties. Ginger rhizomes are usually peeled and grated, sliced, or ground to be used in various dishes or as a herbal remedy for different ailments.