It prefers moist soil rich in organic matter. Hardy to -30 degrees. Space plants 12 in. Hardy to -25 degrees. Space plants 18 in.
Leaves range from blue-green to chartreuse, and many types are variegated.
White or lavender flowers appear in spring or summer. Varieties number in the thousands, so buy from a nursery or specialty catalog with staff who can suggest the best ones. Hardy to -35 degrees. Deep-green, aromatic leaves encircle slender stems 6 to 12 in. Clusters of tiny white flowers top stems in late spring and summer.