1. Fernleaf Yarrow (Achillea filipendula) –Fragrant, gray-green, fern-like foliage grows 18 to 36 inches tall with long-blooming, dense, flat clusters of yellow flowers in June-August. Best in full sun in well-drained dry soil. Heat and drought tolerant, and rabbit and deer resistant. Photo shown: Achillea ‘Coronation Gold’.

2. Goatsbeard (Aruncus dioicus) – Stately 3 to 6-foot tall, colony forming, shrub-like plant.  Dense, creamy-white flower panicles June-July resemble blooms of astilbe.  Grows best in moist, shady gardens.

3. False Spirea Astilbe spp. & cultivars– A long-lived, versatile plant for shady sites. Requires moist, well-drained organic-rich soil. Mid-simmer flowers are feathery plumes or panicles in various sizes and colors. Photo shown: Astilbe chinensis ‘Superba’.

4. Carpathian Bellflower (Campanula carpatica) – A compact, 6 to 12-inch mounded perennial with light blue, cup-shaped flowers on delicate, wiry stems. Blooms June-August in full sun to part shade in moist, well-drained soil. Plants are deer and rabbit resistant. Photo shown: Campanula carpatica ‘Blue Clips’.

5. Large-flowered Tickseed (Coreopsis grandiflora) – Long-blooming, golden yellow, daisy-like to semi-double flowers attract butterflies in early summer. Remove faded flowers to encourage more blooms. Grows 12 to 18 inches tall. Full sun to part shade in well drained soil. Tolerant of dry soil once established. Deer resistant. Photo shown: Coreopsis grandiflora ‘Sunray’.

6. Larkspur (Delphinium spp. & cultivars) – Clump-forming mounds of serrated foliage with 4 to 6-foot spikes of showy gentian-blue flowers in June. Cut back spent flowers to encourage repeat blooms.  Prefers sun and rich organic soil. Deer and rabbit resistant.

7. Purple Coneflower (Echinacea purpurea) – Long-lived, colony-forming garden favorite.  Erect, 24 to 36-inch tall stems support large, pink, daisy-like petals with orange-brown raised cone June through August. Grow in full sun in well-drained soil. Drought tolerant. Photo shown: Echinacea purpurea ‘Kim’s Knee High’.

9. Blanket Flower (Gaillardia xgrandiflora) – Daisy-like flowers are red with yellow margins blooming in June through October. Plants grow 10 to 14 inches tall with gray-green, hairy leaves. Grows best in full sun in well-drained soil. Plants attract butterflies. Deer resistant. Photo shown: Gaillardia xgrandiflora ‘Kobold’.

11. Kopper King Hibiscus (Hibiscus ‘Kopper King’) – Impressive, 12-inch, bold creamy-white flowers with red eye and veining, fade to pale pink. Blooms mid-summer to frost. Foliage is maple-like coppery-red, with orange-red underside. A hardy hibiscus that grows 3 to 4 feet tall in full sun to part shade in moist, well drained soil.

13. Golden Ray Ligularia (Ligularia dentata)– A large, 4 to 5-foot tall perennial with bold, mahogany-red leaves and stately, tall black-stemmed floral spikes of yellow-orange in July and August. Requires moist to wet soil in part shade. Deer resistant. Photo shown: Ligularia dentata ‘Othello’.

14. Hollyhock Mallow (Malva sylvestris) –Long-blooming but short-lived perennial that resembles a loosely branched hollyhock. Plants grow 2 to 3-foot tall with spikes of five-petal pink blooms with burgundy veining. Grows in part shade to full sun. Plants self-sow readily. Drought tolerant. Photo shown: Malva sylvestris ‘Zebrina’

15. Ozark Sundrops (Oenothera macrocarpa) – A 6 to 12-inch sprawling, spreading plant with 3-inch wide, bright yellow flowers, open during the day and close at night. Blooms from June through September. Best grown in full sun and well-drained soil.

16. Garden Phlox (Phlox paniculata ‘Bright Eyes’) –Large clusters of fragrant pink flowers with a red center in June. Flowers attract butterflies. Plants reach 2 to 3 feet tall, and are mildew resistant. Prefers full sun to part shade in moist, well-drained soil.

17. Balloon Flower (Platycodon grandiflorus) – Named for the flower buds that swell like balloons and open to violet-blue, bell-shaped flowers in July and August. Plants are slow to emerge in spring and prefer slightly acidic, humus-rich, well-drained soil. Deadhead to encourage repeat blooms. Excellent yellow fall color and are deer resistant. Photo shown: Platycodon grandiflorus ‘Mariesii’.

18. Perennial Salvia (Salvia nemorosa) – Compact plant, 18 to 24 inches tall with aromatic foliage. Spikes of violet-purple blossoms appear in June-July. Prefers full to part shade; tolerates dry soil. Photo shown: Salvia nemorosa ‘Caradonna’.

19. Pincushion Flower (Scabiosa columbaria ‘Butterfly Blue’) – Low mounded foliage with long flower stems rising 18-24 inches above with abundant, lavender-blue flowers with white centers attract butterflies. Blooms May-September. Prefers full sun in alkaline soil.

20. Speedwell (Veronica spicata 'Royal Candles' ) - Grows 18 to 24 inches tall, in full sun to partial shade. Sturdy spikes of deep violet blue flowers from June-August. Deadhead to encourage repeat blooms. Drought and heat tolerant.