50+ Rock cress looks beautiful cascading over rock walls and has dark blue blooms in spring. Sow Aubrieta ground cover seed indoors 6 - 8 weeks before the last expected frost date. Use starter trays using a sterilized mix. Press the Rock Cress ground cover seeds into the soil and thinly cover. The Aubrieta seed needs light to germinate. Transplant into the garden 12 inches apart after frost danger has passed. After frost season has passed, Rock Cress ground cover seeds can be directly sown into a prepared seedbed outdoors. This perennial will bloom from early spring until summer. It is deer resistant. Does well in full sun to partial shade. Zones 4-9. Instructions included. Combined shipping discount...all additional items ship free.