Saponaria ocymoides

Rock Soapwort is a vigorous, low creeping plant, useful for spilling down sunny slopes or over rock walls. Plants form a low mound of bright-green leaves, literally smothered by starry bright-pink flowers in late spring. Also useful as an edging in the sunny border, and worth considering in tubs or pots. Prune plants back hard immediately after blooming, to maintain a compact habit. Clumps may be easily divided in late summer or early spring. Drought tolerant once established. Evergreen.