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Eryngium Magical® Blue Lagoon

Vivid Blue Thistle Blooms for Garden and Vase

A distinctive, high-performing sea holly, Eryngium Magical® Blue Lagoon produces strong stems topped with striking thistle-like blooms that transition from green to vivid blue in midsummer. Its sculptural foliage and long-lasting flowers bring bold color, texture, and structure to fresh and dried arrangements, while also adding architectural interest to sunny garden borders.

These tough, tap-rooted perennials thrive in hot, sunny locations with well-drained soil.

Who Am I?

  • Common Name:
    Magical® Blue Lagoon sea holly
  • Botanical Name:
    Eryngium planum 'Kolmblula'
  • Type:
    Perennial

Cultural Details

TYPE

Perennial
  • Light:
    Long day, Full sun
  • Soil:
    All soil types, but root rot can occur in poorly drained soil
  • Moisture:
    Well-drained, drought tolerant, sensitive to overwatering
  • Hardiness Zone
    3-8
  • Size:
    24''
  • Spacing:
    18-24'' x 18-24''
  • Bloom Time:
    July through August
  • Bloom Color:
    Blue
  • Diseases & Pests:
    Can suffer from Rhizoctonia so spraying a preventative after planting is recommended
  • Stem Count

    First year: 1

    Second year: 8

    Third year: 8

    Fourth year: 8

    Fifth year: 8

    Sixth year: 8

What Makes Me Special?

Intense blue, thistle-like blooms on sturdy stems provide exceptional texture, color, and long-lasting performance for fresh and dried floral arrangements.

Landscape Use

Sunny borders, cutting gardens, pollinator plantings, and naturalistic perennial plantings where bold texture, architectural form, and vivid blue color are desired.

Pruning

Cut spent blooms to the ground to encourage a 2nd flush of flowers

Propagation

Tissue Culture

Who Am I?

  • Common Name:
    Magical® Blue Lagoon sea holly
  • Botanical Name:
    Eryngium planum 'Kolmblula'
  • Type:
    Perennial

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