Sea Holly

Common name Sea Holly
Latin name Eryngium planum
Type Perennial
Height 1-2'
Spread 12-18" Spreader
Light & Water
Full sun:
Zone 4
Bloom months
  • June
  • July
  • August
Bloom colours Blue
Foliage colours
  • Blue
  • Silver
Features
  • Spreader/self-seeder (Spreader)
  • Winter interest
Notes

Attractive spiny flowers make excellent cut flowers. Dwarf varieties are available. Avoid overwatering or rich soils to maintain a mounded form. Does not transplant easily due to having a taproot. Deer frequently damage this plant. Excellent heat resistance, moderate growth rate.

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