60-90 Days to Maturity. Cerastium biebersteinii. Biebersteinii White Snow in Summer Flower Seeds. Non-GMO, open-pollinated. Perennial in zones 3-8. Deer resistant. Attracts pollinators. Displays white-colored blooms from late spring through the fall. Recommended for growing in rock gardens, borders, or as a ground cover. Plant in the fall or spring. It has a low-growing, spreading, wildflower growth habit with tolerance to cold, drought, and high altitude conditions. Snow in Summer flowers are not recommended for culinary use or growing in hot, humid climates. This particular variety is known for its hardiness and ability to thrive in challenging conditions. Also known as Boreal Chickweed and Mouse-eared Chickweed. ~25,200 seeds/oz.