Valeriana officinalis - Herbaceous perennial. 1 metre height, 50cms width. Part shade. White, sometimes pink, scented flowers held in clusters in summer Cats love this plant, they will chew on all parts of it, even the root. A medicinal herb, for both humans and animals. The root is the medicinal part. Likes a rich, moist soil. Prune back after flowering. Frost hardy.