Some winter loss of foliage may occur without good snow cover. Divide in the spring or cuttings in midseason or fall. Shear back after flowering to promote denser growth. Prefers full sun and neutral or slightly alkaline, lean soil. Water in dry summers.
Weeds can be a problem.
Divide after bloom or by taking basal cuttings in mid-summer. Lower leaves brown when dry in August. Mow at any time to thicken stand and keep under control. Does well in all light conditions. Divide rhizomes in spring.