This shrubby aromatic herb has been used for medicinal and culinary purposes for centuries. It is rarely used nowadays in American cuisine because the leaves have a bitter flavor. Rue grows best in full sun but tolerates light shade. It must have good drainage to survive, however. Rue has fine-texture blue-green foliage and bears yellow flowers in summer. Rue self-seeds, so remove flower heads before they set seed to avoid more plants. This shrub can be clipped into a neat hedge, making it an ideal herb for knot gardens.
More varieties for rue
'Jackman's Blue' rue
Ruta graveolens 'Jackman's Blue' is noted for its especially blue foliage. Like common rue, it bears yellow flowers throughout the summer. It grows 2-3 feet tall and 18-24 inches wide. Zones 4-9
Ruta chalapensis gets its common name from its fringed yellow flowers, which appear in spring on plants with blue-green foliage that closely resembles that of common rue. Other common names for this variety include Egyptian rue, wall rue, and Aleppo rue. It is a favorite larva plant of swallowtail butterflies. It grows 2-3 feet tall and 2 feet wide. Zones 8-10