| Ajuga 'Chocolate Chip' | Ajuga reptans 'Burgundy Glow' |
| Campanula 'Birch Hybrid' | Asclepias tuberosa |
| Aster Novae-angliae 'Purple Dome' | Coreopsis 'Zagreb' |
| Dianthus 'Mountain Mist' | Dianthus 'Tiny Rubies' |
| Echinacea 'Kim's Knee High' | Echinacea 'Magnus' |
| Echinacea 'Ruby Giant' | Echinacea 'White Swan' |
| Gaillardia 'Goblin' | Geranium "Johnson Blue' |
| Heuchera 'Amber Waves' | Heuchera 'Palace Purple' |
| Heucherella 'Kimono' | Iris pallida 'Variegata' |
| Knautia macedonica | Lamium maculatum 'Orchid Frost' |
| Nepeta 'Six Hills Giant' | Nepeta 'Walker's Low' |
| Perovskia 'Filagran' | Phlox subulata 'Emerald Blue' |
| Platycodon 'Sentimental Blue' | Pulmonaria 'Cotton Cool' |
| Pulmonaria 'Majeste' | Pulmonaria 'Mrs. Kittle' |
| Rosa 'Scarlet Meidiland' | Rudbeckia fulgida 'Godsturm' |
| Salvia lyrata 'Burgundy Bliss' | Salvia 'Purple Rain' |
| Salvia 'India Spires' | Sedum 'Autumn Joy' |
| Sedum 'Matrona' | Tiarella 'Neon Lights' |