1. Monkshood (Aconitum carmichaelii) – A 2 to 3-foot tall, clump-forming perennial with terminal spikes of violet-blue hooded flowers on stiff stem. Best sited in rich, moist, organic soil in part shade or full sun with adequate moisture.

2. Japanese Anemone (Anemone hupehensis ‘September Charm’) - Large mounds of serrated foliage topped by many-branched flower stems reaching 2 to 3 feet tall. Single, rose pink flowers stand out against the dark green foliage. Best in filtered sun in cool, moist, humus-rich soil.

3. New York Aster (Aster novae-angliae ‘Purple Dome’) – A solid mound of semi-double purple flowers; 18 inches tall by 36 inches wide. Plants perform best in full sun in well-drained soil.

4. White Boltonia (Boltonia asteroides) – Daisy-like clusters of white flowers with fine-textured, blue-green leaves. Open, loose habit, 3 to 4 feet tall, easily grown in well-drained soil in full sun. Pinch back growing tips during season for a more compact plant.

5. Butterflybush (Buddleja davidii) – Fragrant spikes of purple, white, or pink flowers on long narrow stems attract butterflies.  Prune stem to ground in early spring for best flowering. Prefers full sun in loose, well-drained soil.

6. Bluebeard  (Caryopteris x clandonensis) - A compact, 2 to 3-foot, mounded shrub-like plant with striking cornflower blue flowers and slightly scented silver-gray foliage. Cut stems back in early spring for best flowering. Prefers full sun to part shade in well-drained soil.

7. Plumbago or Blue Leadwort (Ceratostigma plumbaginoides) – Low-growing, 8 to 10-inch trailing ground cover. Attractive bright blue flowers contrasts nicely with bronzy red fall color. Plants
emerge late in spring and grow best in full sun to part shade in well-drained soil.

8. Turtlehead (Chelone obliqua) – A great plant for moist soil. Hooded pink flowers are arranged tightly around the tips of dense, upright 3-foot tall stems. Prefers humus rich, moist soil in part shade to full sun.

9. Hardy Chrysanthemum (Dendranthema ) – A mounded, 1 to 3-foot tall mum with various flower colors and shapes, and aromatic gray-green leaves. Best planted in spring in full sun and well-drained soil to survive winter freezes. Pinch-off growing tips regularly until early July to promote compact habit.

10. Hardy Ageratum (Eupatorium coelestinum  – Erect, 1 to 2-foot tall stems support compact clusters of fuzzy, purplish-blue flowers that attract butterflies. Cut back regularly to promote bushier habit. Performs best in full sun with moist, well-drained soil.

11. Sneezeweed (Helenium autumnale) – Showy, daisy-like blooms in shades of rich yellow, red, and orange with brown centers. Plants vary from 2 to 4 feet tall and are adaptable to poor soils, but does best in moist, well-drained soil in full sun.

12. Lemon Queen Sunflower (Helianthus ‘Lemon Queen’) – Handsome, upright, clump-forming sunflower reaching 6 to 7 feet tall. Daisy-like, 4 to 5-inch wide, lemon yellow flowers with dark centers attract butterflies and birds. Tolerant of most soil types, especially hot dry sites.

13. Yellow Waxbells (Kirengeshoma palmata) – Beautiful, shrub-like perennial with light green, maple-like leaves. Thick, waxy, bell-like yellow flowers appear in August, followed by inflated, 2-horned fruit. Prefers a rich, organic, moist soil in partial shade. Slow growing plants reach 3 to 4 feet tall and wide.
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14. Cardinal flower (Lobelia cardinalis) – A striking, 2 to 4-foot tall erect plant with ascending wand of tubular-shaped scarlet flowers that attract hummingbirds. Grows best in partial shade with consistently moist soil.

15. Russian sage (Perovskia atriplicifolia) – Semi-woody to herbaceous shrub develops an open, upright habit 3 to 4 feet tall. Fragrant, light gray, slightly toothed foliage remains attractive in winter. Lavender-blue flowers appear on open spikes lasting into October. Best in full sun and well-drained soils.

16. Obedient Plant (Physostegia virginiana) – An easily grown plant that bears spikes of beautiful white, pink, or purple flowers.  The common name arises from the tendency of the flowers, resembling snapdragons, to obediently remain in any posed position.  This 2 to 4-foot erect plant prefers full sun in moist soil. Makes a fine cut flower.

17. Black-eyed Susan (Rubeckia fulgida) – A mounded, 2 to 3-foot tall, upright, spreading plant with coarse textured foliage and showy orange-yellow, daisy-like flowers with a deep brown center. Seed heads are a favorite food of birds in autumn and winter. Prefers full sun and well-drained soil.

18. Autumn Joy Stonecrop (Sedum ‘Herbstfreude’) – A long-lived, 1 ½ to 2-foot upright sedum.  The broccoli-like flower heads slowly open to shell pink and age to a deep bronze-red. A tough, low maintenance perennial for average to rich, well-drained soils in full sun to light shade.
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19. Goldenrod (Solidago rugosa ‘Fireworks’) – A compact, 2 to 3-foot tall, clump forming plant with arching, fountain-like stems. Long narrow panicles of golden yellow flowers give the impression of fireworks. Best in full sun and well-drained soil.

20. Toad lily (Tricyrtis hirta) – Clusters of small, unique, orchid-like spotted flowers on tall, 2 to 3-foot, upright, arching stems with long, parallel leaves. Performs best in partial shade in rich, highly organic, moisture retentive soil. Valuable for adding late season interest to the shady border.