Blue Glitter Sea Holly (Eryngium planum ‘Blue Glitter’)
Shimmering Blue Perennial for Pollinator Gardens & Dry Landscapes
🌿 Plant Overview
Common Name: Sea Holly ‘Blue Glitter’
Botanical Name: Eryngium planum ‘Blue Glitter’
Plant Type: Herbaceous Perennial
Family: Apiaceae
Hardiness Zones: 5–9
Native Range: Europe and Asia (species origin)
📊 Key Characteristics
Height: 24–36 inches
Spread: 12–24 inches
Bloom Time: June to September
Flower Color: Violet-blue
Foliage: Green
Growth Habit: Compact, upright
☀️ Growing Conditions
Sun Exposure: Full sun
Water Needs: Moderate (drought tolerant once established)
Soil: Well-drained, sandy or loamy preferred
Maintenance Level: Low
Sea holly thrives in sunny, dry conditions and performs exceptionally well in sandy or poor soils where many plants struggle.
🌸 Garden Features
✔️ Unique metallic-blue flower heads
✔️ Long bloom period
✔️ Attracts butterflies and pollinators
✔️ Drought and heat tolerant
✔️ Deer and rabbit resistant
✔️ Salt tolerant
✔️ Excellent for cutting and drying
✂️ Care & Maintenance
Minimal care required. Avoid overly rich or wet soils. Deadheading can prolong bloom, though dried flower heads also add ornamental interest.
🌼 Landscape Uses
Borders, rock gardens, pollinator gardens, coastal plantings, containers, xeriscape gardens
🌿 19 Birch Lane Insight
‘Blue Glitter’ adds a striking, almost sculptural texture to the garden—perfect for creating contrast among softer plantings and adding visual interest in dry, sunny spaces.
🌱 Noteworthy Characteristics
This standout perennial produces spiky, thistle-like blue flower heads that shimmer in the sunlight. Its architectural form and drought tolerance make it a favorite for modern garden designs and pollinator-friendly landscapes. The blooms also dry beautifully, making them ideal for floral arrangements.
⚠️ Problems
No major issues. Requires excellent drainage—wet soils may lead to root problems.
Blue Glitter Sea Holly (Eryngium planum ‘Blue Glitter’)
Shimmering Blue Perennial for Pollinator Gardens & Dry Landscapes