Commonly known as wormwood, Artemisia ‘Powis Castle’ got its cultivar name (a reference to the famous British medieval fortress) when plantsman Graham Thomas found it growing in a small north England garden. Since that time, ‘Powis Castle’ has gained great popularity among gardeners because, unlike other Artemisias, which deteriorate after they flower, it doesn’t flower at all; instead, it is prized for its bushy mounds of striking, lacy, silver foliage.
Well suited to dry, sunny areas of the garden, wormwood makes a perfect foil for vibrant annual and perennial blooms or a colorful border addition. Plus, it’s easy to care for, tolerating extreme summer heat, though it prefers dry spots in the garden. Plant in a sunny site with well-drained soil, setting the plants at a distance equal to their mature spread. Water after planting, mulch to conserve moisture and reduce weeds, prune or cut them back to near ground level in spring, and be sure to provide well-drained soil—one of the keys to any gardener’s success with wormwood.
305 Litchfield Turnpike (Route 202 near the intersection of Route 341)
Woodville, CT 06777
Available at local nurseries