SNOW IN SUMMER (Cerastium biebersteinii.) - Easy-to-grow from Snow in Summer seeds, this perennial is a great herbaceous ground cover, which is low-growing, creeping, very dense and mat-like, and 6 inches tall by 12 - 24 inches wide. Although Cerastium Snow in Summer tolerates no foot traffic, it performs very well as a general flowering ground cover plant. It works very well on sunny banks that are too steep to mow, between steppingstones, and in the cracks of stone walls and ledges. Snow in summer grows fast and is drought tolerant once established, 500+ Seeds per order. Thank You. Cerastium biebersteinii. Perennial. Full sun. Afternoon shade in hot areas. Spring, soil temp 68F+. SOW-Press 3 seeds per, into soil about 8" apart. don't cover. Keep moist. Germination 14-28 Days. Height 6" x 8" wide.