The removal of seed heads, as the flowers fade, may encourage a second crop of flowers. Provide sun to partial shade and any ordinary garden soil but avoid hot dry conditions. Propagation is by seed, division or cuttings.
Division is done spring or fall.
Plants rise out of the ground as they age so need dividing. Stem cuttings can be taken in summer. Blue Pearl' - Bright blue flowers. This cultivar has been listed as P. boreale and P. reptans in some catalogs and references. Ray Wiegand's Nursery 1999.