Hidcote Blue English Lavender Lavandula angustifolia 'Hidcote Blue' Full sun Water Needs: Once established, needs only occasional watering. Average landscape size: Moderate grower to 2 to 3 ft. tall and wide.
Variegated Winter Daphne | Evergreen shrub prized for beautiful rosy-pink flower buds that open to white, sweetly fragrant flowers in winter and early spring. Green foliage is attractively variegated with a yellow margin. 3'-4' tall and wide. Partial sun.
False Indigo (Baptisia australis) is a big perennial that's tough as nails, false indigo kicks off summer with spires of pure blue (cultivars come in a variety of other colors). Its rounded form makes a great contrast to the verticality of prairie grasses. False indigo develops deep taproots, so site it in a spot for the long term. It self-seeds modestly, and it's safe to move seedlings when small. Grows up to 4 feet high and wide in Zones 3 to 9.