| Description | Blue Cap Sea Holly (Eryngium planum ) is a striking plant with blue globular flower heads, blue bracts, and spiky foliage. |
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| Pronunciation | (e-RIN-ji-um) |
| Plant Type | Perennials Hardy |
| Hardiness Zone | 5-8 |
| Sunlight | full |
| Moisture | average, dry, never wet |
| Soil & Site | average, well drained, does good in poor soil |
| Flowers | globular blue flower heads, 9-15 involucral of bracts, bracts create a collar under the flower, good dried flower |
| Leaves | alternate, stems leaves are sessile and deeply dissected |
| Roots | tap root |
| Dimensions | 28 inches |
| Propagation | fresh seeds germinate within 3-4 weeks, if they fail to germinate a vernalization period of 2-4 weeks at 40 F maybe needed (Jelitto) |
| Cultivar Origin | Introduced by Jelitto Perennial Seeds of Germany in 1992. Originating from the sterile cultivar, E. Blauer Zwerg. |
| Notes & Reference | #40-Herbaceous Ornamental Plants (Steven Stills), Jelitto Perennial Seeds web site |
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