Artemisia 'Powis Castle' is a popular cultivar of the Artemisia genus, also known as Wormwood. It is a herbaceous perennial plant that is native to the Mediterranean region and is commonly grown for its attractive silvery-gray foliage.

The plant has a mounding growth habit and can reach a height of 2 to 3 feet and a width of 3 to 4 feet. Its leaves are finely divided and feathery, with a silvery-gray color that creates a stunning contrast in the garden. The foliage is aromatic and releases a strong, pleasant scent when rubbed or crushed.

Artemisia 'Powis Castle' is an easy-to-grow plant that requires minimal care. It is drought-tolerant and can grow in a variety of soil types, as long as they are well-draining. It prefers full sun exposure but can also tolerate some shade. The plant is also relatively pest-resistant and disease-free.

The plant is often used in landscaping as a low-maintenance, drought-tolerant groundcover, or as a specimen plant to add texture and interest to a garden bed. It also works well in rock gardens and as a border plant. Artemisia 'Powis Castle' can be pruned back in the fall to promote denser growth and prevent the plant from becoming leggy.

In summary, Artemisia 'Powis Castle' is an attractive and easy-to-grow herbaceous perennial plant that is commonly grown for its striking silvery-gray foliage. It is a versatile plant that can be used in a variety of landscaping applications and is known for its low-maintenance requirements and drought tolerance.