— Snow-in-summer is a perennial flower that gets its common name from its blooming habit. It blooms in the early summer, with small white flowers densely spaced. 8-10 inches tall. Grow Snow in Summer in full sun. Plants will also tolerate light or partial shade spot. They prefer rich, loose soil that drains well. Spreads by self-seeding, as well as runners. Excellent ground cover, border plant, hanging baskets, or, let it spread over rock walls. Several 4 inch pots. Gorge/Admirals area.