Artemisia x 'Powis Castle'

Powis Castle Artemisia, Wormwood




Family: Compositae

Genus: Artemisia

Category: Perennial

Zones: 6 to 8

Size: 2 to 3' tall and wide.

Growth Rate: Fast

Exposure: Sun


Evergreen. Silver-gray, aromatic, feathery foliage. Cut back in late spring if too woody. Needs well-drained soil. Susceptible to root rot in poorly drained soil. Spreads by underground rhizomes. Rabbit resistant.


1993 Garden Merit plant from Royal Horticultural Society.

Probably a hybrid (Artemisia arborescens x Artemisia absinthium).

Originally taken as a cutting from a plant in an unknown garden by Jimmy Hancock who later became the head gardener at Powis Castle in Wales. Purportedly introduced in 1972. (Source: Garcia, S., Garnatje, T., Twibell, J. D. and Valles, J. 2006b. Genome size variation in the Artemisia arborescens complex (Asteraceae, Anthemideae) and its cultivars. Genome 49:244-253.)


My Experience: 

Purchased a 1-gallon plant from Evergreen in April 2010. Planted near the bluebird house. Performed well until mid-summer when it started to brown out. I thought this might have been root rot because it was being watered automatically by the perennial garden sprinkler head. However, it turned out that the sprinkler was not reaching it, so instead of too much water it was getting too little. One branch remained and new shoots started to emerge after I began hand watering. By the end of the summer it had about half the size it had before the drought.

Sources of Information

© 2010-12 Lisa J. Miner