The many varieties of phlox reach a height of from 1 to 4 feet and bear salmon, pink, magenta, white, red or purple flowers. They prefer a fertile well-drained soil with a constant supply of moisture. Wide spacings help control disease problems and maintain maximum flower size.
Full sun is preferred but light shade is acceptable.
Cut back old flower stems to prolong the blooming period. Self seeded volunteers have inferior flower color. Dieback occurs if plants are not divided often enough. Removal of weak shoots enhances flowering on stronger shoots. Propagation is by seed, root cuttings, division and softwood cuttings.