- You Will Get 800 Seeds Of White Alpine Rockcress Aubrieta Rock Cress Arabis Alpina Flower Seeds. - Description: - Name: Alpine Rockcress. - Scientific Name: Arabis Alpina. - Color: White. - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost. - Plant Height: 4 - 6". - Plant Spacing: 15 - 18". - Bloom Time: Spring. - Hardiness Zone: 3 – 8. - Light Requirements: Sun - Part Shade. - Soil & Water Preferences: Dry.