Hardy herbaceous perennial whose name comes from the Greek for 'sweet root'. Grows best in well-drained soils in deep valleys with full sun. The roots are harvested in the autumn two to three years after planting to use as a sweetener and chewed to clean teeth. Highly valued medicinal herb with many uses. Also fixes Nitrogen and attracts bees. Sun/pt shade. Moist soil. Height to 1m. 9cm pot.