This herbaceous perennial is native to Europe. The root has been widely used as a food and for its beneficial properties. The plant prefers moist garden soil in the full sun or part shade. Sow seed in the spring by scarifying seed on medium grit sandpaper, strewing on the surface, barely covering with soil. Tamp securely, and keep evenly moist and warm until germination, which usually occurs in a week or two. Work seedlings up in pots or sow directly into the garden. Thin or transplant to two feet apart.