Sienna Sunset Coreopsis verticillata Threadleaf Plant
Pale orange flowers mature to a rich apricot-salmon shade!
'Sienna Sunset' is a cultivar of the native Threadleaf Coreopsis, discovered as a naturally occurring branch mutation of C. 'Creme Brulee.' Its 1½-inch blooms open a pastel shade of orange, then gradually mature to apricot with hints of salmon. Unbelievably profuse, they cover compact plants just 16 to 20 inches tall and 36 inches wide. The show begins in early summer and continues right up to the first frost of autumn.
The foliage of this perennial is handsome as well. Very finely cut, it is mid-green and held discreetly below the blooms, which arch up and out from the plant on slender stems. Many Threadleaf Coreopsis cultivars are plagued by powdery mildew, particularly in humid or rainy climates, but 'Sienna Sunset' demonstrates a breakthrough in resistance to this disease. Even if you live where summers are long, hot, and humid, it will stay fresh and healthy!
An adaptable native, 'Sienna Sunset' is very attractive to butterflies while repelling unwanted pests such as nibbling deer and rodents. It tolerates dry soils, though good drainage is essential. You will find it quick and easy to grow in any sun-drenched garden spot. It can also tolerate a bit of shade, but the best blooming and vigor will occur in full sun settings. Find its ideal location in your garden! Zones 5-9.
| Genus | Coreopsis |
| Species | verticillata |
| Variety | 'Sienna Sunset' |
| PPAF | 20,470 |
| Item Form | 1-Quart |
| Zone | 5 - 9 |
| Bloom Season | Early Summer - Late Fall |
| Habit | Mound-shaped |
| Plant Height | 16 in - 20 in |
| Plant Width | 3 ft |
| Additional Characteristics | Bloom First Year, Butterfly Lovers, Cut-and-Come-Again, Easy Care Plants, Flower, Free Bloomer, Long Bloomers, Native, Pruning Recommended, Repeat Bloomer, Season Extenders |
| Bloom Color | Apricot, Light Orange, Salmon |
| Foliage Color | Medium Green |
| Light Requirements | Full Sun |
| Moisture Requirements | Dry, Moist, well-drained |
| Resistance | Cold Hardy, Deer Resistance, Disease Resistant, Drought Tolerant, Heat Tolerant, Pest Resistant, Powdery Mildew |
| Soil Tolerance | Normal, loamy, Poor |
| Uses | Border, Containers, Cut Flowers, Outdoor |
| Restrictions | Canada, Guam, Hawaii, Puerto Rico, Virgin Islands |