Snow-in-summer: Cerastium tomentosum
The Cerastium genus, a member of the Caryophyllaceae, can be found in almost all temperate regions of the northern hemisphere as far as the Arctic. C. tomentosum is native to the mountains of southern and eastern Europe and is a vigorous, spreading,ground-cover plant with narrow, silvery green leaves. In late spring and summer it bears a profusion of loose clusters of white, star-shaped flowers. This is why it looks particularly attractive against a dark background. Planted along the edge of a terrace, the dense foliage will prevent from growing. It also looks very pleasant in and as underplanting in containers. It combines beautifully with avens, flax and tall bellflowers. Snow-in-summer is easy to grow and is easily propagated by division after flowering. It grows best in sandy, well-drained in a sunny position but also grows quite well in partial shade.