Spent blossoms on these summer-flowering perennials can be clipped to encourage blooming long into the fall.
Hardy begonia (Begonia grandis subsp. evansiana)
Fragrant, clump-forming pink or white flowers with oval olive-green leaves; blooms from mid-summer to early fall, sometimes through frost; up to 2 feet tall; grows best in part to full shade in rich, well-drained soils; hardy to -10 degrees F; Zones 6 to 9
Periwinkle-blue or white blossoms provide color from summer until frost with smooth or hairy leaves, 2–4 inches long; grows up to 5 feet high; easily grown in dry to medium-wet soil in full sun; hardy to -20 degrees F;Zones 5 to 9
Compact, clump-forming perennial with spherical, dark-blue flower heads with oblong, stiff leaves; grows up to 3 feet high; tolerant of many soils except rich; easily grown in full sun; hardy to -40 degrees F; Zones 3 to 9
Late and long-flowering, wiry-stemmed ground cover with deep, brilliant blue flowers; easily grown in medium-wet well-drained soils in full to partial shade; hardy to -10 degrees F; Zones 6 to 9
Vertical flame-red, inch-long flowers with oval to oblong, toothed, often glossy green leaves; grows up to 3 feet tall; needs constant moisture in rich, wet soil in full sun to part shade; hardy to -40 degrees F; Zones 3 to 9
Gray-white stems bearing oval, deeply divided, silver-gray leaves with tubular, violet-blue flowers in panicles up to 12 inches long; grows up to 3 feet tall; easily grown in dry to medium-wet soil in full sun; hardy to -20 degrees F; Zones 5 to 9
Robust, upright perennial with whorls of narrow to oval purple-green leaves and panicles of light- to deep-purple flower heads with attractive seed heads that persist well into the winter; grows up to 7 feet tall; easily grown in medium-wet to wet soils in full sun; hardy to -40 degrees F; Zones 3 to 9
Clump-forming goldenrod hybrid with small, golden-yellow flower heads in long, flattened panicles with mid-green leaves; grows up to 2 feet tall; easy to grow in dry to medium-wet soil in full sun; hardy to -20 degrees F; Zones 5 to 9
Native Plant Climate Zone Map
1. Northern Pacific Coastal/Cascade Mountain Forests
2. Palouse
3. Great Basin Desert
4. Sierran Foothills/Alpine Vegetation
5. California Grasslands, Chaparral, and Woodland
6. Mojave and Sonoran Deserts
7. Rocky Mountain Forests/Alpine Vegetation
8. Central Prairies and Plains
9. Eastern Deciduous Forests
10. Boreal Forests
11. Coastal Plain Forests
12. Tropical
