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Eryngium – Blue Star Alpine Sea Holly (Eryngium alpinum) Non-GMO – Organically Grown – Flower

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Eryngium – Blue Star Alpine Sea Holly (Eryngium alpinum) Non-GMO – Organically Grown – Flower

 

Perennial 

Full sun

 

Yes – Prefers full sun, but will tolerate light partial sun.

Full Description

 

 

 

Eryngium ‘Blue Star’ (Eryngium alpinum) is a striking and elegant perennial known for its metallic blue, thistle-like flowers surrounded by dramatic spiky bracts. This variety is a softer and shorter form of alpine sea holly, making it ideal for smaller gardens, borders, and modern perennial plantings.

Growing to a manageable height of 12–28 inches, ‘Blue Star’ produces long-lasting blooms that add strong architectural interest and unique texture. The flowers are excellent for both fresh and dried arrangements, retaining their colour and form beautifully.

Highly attractive to bees and other pollinators, Eryngium is also deer resistant and drought tolerant once established, making it a low-maintenance yet visually bold garden plant.

 

 

Full Growing Information From Seed

  • Plant Type: Perennial flowering plant
  • Growth Habit: Upright, clump-forming
  • Height: 12–28 inches (30–70 cm)
  • Light: Full sun to light partial sun
  • Soil: Well-draining, sandy or gravelly soil preferred
  • Water: Low to moderate; drought tolerant once established
  • Sowing: Start indoors or direct sow outdoors
  • Seed Depth: Surface sow or lightly cover
  • Germination Time: 14–30 days (can be slow and irregular)
  • Temperature for Germination: Cool conditions preferred
  • Spacing: 12–18 inches apart
  • Bloom Time: Summer
  • Maintenance: Very low; avoid overly rich soil
  • Cut Flower: Excellent for fresh and dried use
  • Pollinators: Attracts bees and beneficial insects
  • Deer Resistant: Yes
  • Companion Plants: Lavender, echinacea, ornamental grasses, salvia

 

 

 

 

Stratification:

Yes – Cold stratification recommended.

For best germination:

  • Cold stratify seeds for 3–4 weeks in the refrigerator before sowing.
  • Alternatively, fall sow outdoors to allow natural winter stratification.

 

This significantly improves germination success.

 

 

Medicinal Properties

Species within the Eryngium genus have a history of traditional herbal use, including:

  • Mild diuretic properties
  • Traditionally used for respiratory support
  • Used in folk medicine for digestive and urinary health

 

However, Eryngium alpinum itself is grown mainly as an ornamental plant, and is not commonly used in modern herbal medicine.

Seed Count: 25

 

 

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