|Rhizomatous, erect, fast spreading perennial that grows to 24" tall and 20" wide. Leaves are rough, slender, ovate, conspicuously veined, medium green, up to 3" in length. An abundance of double, white, phlox-like flowers, to 3/4" wide, are borne in summer through fall. Grows well in any soil if given full sun. This is an excellent plant for rock gardens, terraces, and stone walls. Native to Europe.