20 SWEET WOODRUFF ASPERULA Galium Odoratum Flower Seeds BLOOM TIME: Spring HARDINESS ZONE: 5 - 9 PLANT HEIGHT: 6 - 8" . . . PLANT SPACING: 9 - 12" LIGHT REQUIREMENTS: Shade . . . SOIL / WATER: Average This charmer has vanilla scented leaves. The dried leaves are frequently used in potpourri. It is slow to germinate (up to 200 days) but grows quickly once its started. It will add great color in a shade garden or around trees. Its leaves have a beautiful unique shape, and is an herb used in traditional medicine and as an insect repellant.