Stachys (lamb's ears) Stachys byzantina Grown primarily for the velvety silver foliage that children love to touch. It does send up 12 to 18 in. spikes with small purple flowers that are popular with bees and hummingbirds. Will get some die-off in the winter especially in poorly drained locations. 12 to 18 in. tall, Full Sun
Veronica 'Sunny Border Blue' - Top 10 Plants for Seaside Gardens - Coastal Living | If deadheaded faithfully, these flowers will bloom May through October. Divide it every three years and share the wealth with friends.
IRIS Iris siberica (Siberian Iris) 'Ceasar's Brothers', 'Atoll', Flight of Butterflies', 'Summer Skies', 'Wing on Wing' This species blooms in purples, mauve and white and requires a moist location. Usually dies out in the center which means division at least every three years. 2-3 ft., Full Sun to Partial Shade
Golden lily-type flowers punctuate a mound of strappy leaves. This is a reblooming daylily, so you can expect blossoms to open all season long. Full sun coaxes the most flowers to form. Combines well with: Siberian iris, purple coneflower and bee balm. Hardy in Zones 3 to 9.
20+ Favorite Flowering Vines For the Fence and Arbor