Noteworthy CharacteristicsSilver-gray, aromatic foliage. Has naturalized in some areas, including New England. All parts of the plant should be considered poisonous.

CareNeeds excellent drainage and full sun to grow well. Soil may be poor to moderately fertile. Deadhead to control self-seeding. Cut to the base in autumn, or shear in spring.

PropagationSow seed in a cold frame, or divide, in autumn or spring. Root greenwood cuttings or heel cuttings of side-shoots in early summer.

ProblemsWhite rust, downy and powdery mildews, rusts, and fungal leaf and stem diseases are common.