The iridescent, cobalt blue flowers of 'Big Blue' are held on blue stems and contrast beautifully with the spiky silvery foliage.
| Perennial | |
| Eryngium | |
| Sea Holly | |
| Zone 4 | |
| 6+ hours | |
| Dry, Moist, Sandy | |
| Accent perennial with Grasses and Coreopsis | |
| Planting with Artemisia and Echinacea | |
| 32-34" | |
| 12-18" | |
| Fall, Summer | |
| Blue | |
| 2.5" | |
| Rapid | |
| Upright | |
| Flower-tone | |
| Structure | |
| Yes | |
| Yes | |
| Yes | |
| Geum, Crocosmia, Perovskia, Achillea |