Galium odoratum Common Name: Sweet Woodruff. Zones 4 to 8 Part Shade to full shade. Mature height of 6 to 12 inches and a spread of 12.5 inches. A vigorous, herbaceous, mat-forming, perennial ground cover. Galium odoratum, commonly known as sweet woodruff, is a charming, low-growing perennial that i... See More