Company: BI. The state flower of Colorado, Rocky Mountain Blue is a beautiful heirloom addition to your perennial garden. Along with the dazzling pale violet and white, long-lasting blossoms, it has delicate, beautiful, blue-green foliage, somewhat like maidenhair fern. At home in part shade as well as full sun. Use in rock gardens, borders, and as a cut flower. North American native wildflower.