Family: Rutaceae

Originally from the Mediterranean through to south-west Asia, this genus contains about eight species of pungently aromatic, perennial herbs and sub-shrubs. One of the species, commonly known as rue or herb of grace, is grown in herb gardens for its medicinal properties rather than for culinary usage, as it has a strong odor and bitter taste. However, its cultivars and other species are grown for their striking, greyish green, lacy foliage and bright yellow, four-petalled flowers, borne in terminal clusters. All are strongly aromatic.

Species

R. graveolens, rue, from the Mediterranean, yields an essential oil containing rutin, used to treat blood pressure. With attractive foliage and clusters of small, yellow summer flowers, it is an attractive garden plant, often grown in mixed borders. Handle with care as it may cause dermatitis. Cultivar 'Jackman's Blue' has attractive foliage with a marked blue colour; 'Variegate', to 45 cm (18 in), has grayish green leaves with white margins.

Cultivation

Ruta can adapt to poor soils, but prefers an open, sunny position and good drainage. Prune mature plants to maintain a neat shape. Propagate from seed sown in spring, or by root division. Cultivars are best propagated from 15 cm (6 in) long, firm shoots struck in late summer or early autumn.

Climate

R. graveolens can be grown in zone 5.