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Product Description
Add striking texture and unique color to your garden with Eryngium Planum Flower seeds. Known for their steel-blue, spiky blooms and long-lasting foliage, these heirloom, non-GMO seeds are perfect for borders, rock gardens, and container planting. Easy to grow and low-maintenance, Eryngium Planum enhances garden design with architectural beauty while attracting pollinators.
Features & Specifications:
Variety: Eryngium Planum – Perfect for Borders
Seed Type: Heirloom, non-GMO
Germination Rate: High, suitable for home planting
Plant Height: 50–90 cm (20–36 inches)
Flowering Season: Summer
Light Requirements: Full sun to partial shade
Ideal For: Borders, rock gardens, containers, and pollinator-friendly gardens
Planting & Sowing Instructions:
Sowing: Sow seeds on the soil surface of a well-draining seed-starting mix. Lightly press into soil; do not cover deeply.
Watering: Keep soil evenly moist during germination without overwatering.
Temperature: Optimal germination occurs at 18–22°C (65–72°F).
Germination Time: Seeds usually sprout in 14–21 days.
Transplanting: Transplant seedlings into garden beds or containers once they have 2–3 true leaves.
Care: Low maintenance; once established, Eryngium Planum is drought-tolerant and provides long-lasting blooms.

Life Cycle
Hardy Perennial Flower
Planting Season
Spring Early Summer
Growth Habit
Upright Branching Growth
Flavor Profile
Non Edible Ornamental
Plant Characteristics
Spiky Blue Flowers
Use
Borders Cut Flowers
Growing Conditions
Dry Sunny Climate
Harvest Advantages
Long Lasting Blooms
Plant Resistance
Drought Deer Resistant
Scientific Name: Eryngium planum
Seed Names
Eryngium Planum Seeds
Seed Type
Heirloom Open Pollinated
Eryngium Planum, commonly called Sea Holly, is a striking ornamental plant known for its spiky blue flower heads and silvery stems. This hardy perennial thrives in sunny, well-drained locations and is highly valued for its unique texture and long-lasting blooms. Sea Holly is perfect for borders, wildflower gardens, and dried flower arrangements.
Light Requirement
Full Direct Sun
Planting Depth
1/8 Inch Deep
Sowing Method
Direct Sow Outdoors
Plant Spacing
12–15 Inches Apart
Days to Maturity
90–120 Days
Soil Preparation
Cold Stratification Needed
Hardiness Zones
USDA Zones 4–9
Water Needs
Low Moderate Water
Planting Season
Spring Early Summer
Seed Count
Recommended Coverage
100
Up to 10 sq ft
500
Up to 50 sq ft
1000
Up to 100 sq ft