Both used as food and medicine, the root and seeds of burdock are easily harvested and grown. The roots have an earthy taste and are great dried for tea or used fresh in stir-fry. The root is a good source of iron and is known as a liver tonic and blood cleanser. Be sure to dig ALL the root or risk the plant going to seed. If you want the seed, try to harvest it completely or you risk it spreading rampantly through your herb garden, as it has mine. In some places in the country this is a major invasive species! Biennial.