How to grow sea holly
Eryngium planum
When to plant sea holly
Propagate sea holly most easily by separating plantlets from the base of the parent plant, or from seed (NC State). Plant in full sun in well-drained sandy or loamy soil; the more sun it receives, the more intense the blue flower color.
Sea Holly is timed by season rather than your frost dates, so the planting calendar does not generate ZIP-specific dates for it. Check the cited sources below to fine-tune for your area.
Growing conditions
- Lifecycle
- Perennial
- Spacing
- 12 to 36 in apart
- Sun
- Full sun
- Soil pH
- 6 to 8
Common problems
Sources
Last updated .