Fast growing, short-lived annual grown for the protein-rich leaves and plant tops. Leaves are also high in calcium and iron. The seeds of vegetable amaranth may be eaten but grain amaranth species are much better sources of seeds. Amaranths like sunny locations; germinating and growing best where day temperatures reach at least 21C (70F). They require nutrient-rich soils, with potash and nitrogen in good supply. Mostly short day crops.