Eryngium planum
Flat Sea Holly, Blue Cap, Eringoe, Eryngo
Family: Apiaceae Carrot
| Type | Perennial |
| USDA Hardiness range | 5A - 8B |
| Exposure | Full sun |
| Bloom color | Blue |
| Bloom time | Early Summer to Early Fall |
| Water needs | Dry |
| Landscape uses | Container, seashore |
| Height | 24" to 36" / 60cm to 90cm |
| Spread | 36" to 36" / 90cm to 90cm |
| Growth rate | Moderate |
| Bloom attributes | Suitable for cut flowers, suitable for dried flowers |
| Leaf color | Silvery |
| Fruit color | n/a |
| Soil type | Sandy |
| Form | Upright or erect |
| Attributes and features | Naturalizing |