Amaranth/Pigweed is a common weed that is highly nutritious! Use the greens in soups, stir fries, or salads. eat the dried seeds raw or roasted. The seeds are very high protein and have lysine, fiber, and calcium. A single plant can produce 100,000 seeds! The leaves have vitamins A and C, iron, fiber, calcium, and manganese. Amaranth is a highly sustainable food crop because of its drought resistance and fast rate of growth and proliferation.