Picture of 'Silver King' artemisia plants (Artemisia ludoviciana 'Silver King'). 'Silver King' artemisia plants grow 2'-3' high. A rapid spreader, 'Silver King' artemisia plants may be a bit too vigorous for those worried about harboring "invasive" plants. Their attractive silvery foliage has become the base or accent for many a fall wreath. In the picture above, notice how nicely the silvery foliage of 'Silver King' artemisia complements the yellow flowering plants in the background. But color is only part of the appeal of 'Silver King' artemisia. The foliage's fine texture is also useful in providing contrast within a planting bed. 'Silver Queen' is a similar artemisia plant but is more compact. Zones 3-9.