Saponaria

Commonly called soapwort grows to 12" tall on stiff, unbranched stems. Features clusters of fragrant, pink flowers from mid to late summer. Dark green leaves (to 3" long). Easily grown in average, dry to medium, well-drained soil in full sun. Tolerates poor rocky or sandy soils. Spreads by rhizomes, but is not as aggressive as the species. Deadhead spent flowers to prolong bloom period.