Family: Caryophyllaceae

Native to Europe and America, these tufted or mat-forming plants, with gray leaves and white flowers, are suitable for rockeries or banks, particularly those which need binding to prevent erosion. Most species require cutting back each year as they can become invasive. A few species like C. glomeratum, mouse-eared chickweed, are common garden weeds.

Species

C. alpinum, to 12 cm (5 in), is suitable for rock gardens, but needs good drainage. This perennial has tufts of silvery leaves and white, spring flowers. Var. lanatum is very woolly with white foliage.

C. tomentosum, snow-insummer, the most commonly cultivated of the species, is a vigorous grower, with a prostrate, creeping habit. It has tiny, gray leaves and a profusion of starry, white flowers in late spring and summer. There are several varieties and cultivars which may sometimes be available, but the species itself is commonly grown.

Cultivation

Cerastium must be grown in an open position in full sun. The soil must be well drained, but need not be rich. Propagate by seed, by small divisions or from cuttings which strike very easily. Plant in early spring.

Climate

Zone 4.