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Product Description
Heirloom Eryngium Planum, commonly known as Sea Holly, is admired for its striking spiky blooms and silvery-blue foliage. This heirloom variety offers a long bloom season, making it perfect for borders, rock gardens, and pollinator-friendly landscapes. Easy to grow and low-maintenance, Eryngium Planum adds a unique architectural element and vibrant color to any garden.
Features:
Heirloom Eryngium Planum variety
Produces spiky, long-lasting silvery-blue blooms
Ideal for borders, rock gardens, and pollinator-friendly landscapes
Low-maintenance and easy to grow
Attracts pollinators and adds structural interest
Specifications:
Plant Type: Perennial flowering plant
Height: 18–36 inches
Bloom Time: Summer to early fall
Light Requirements: Full sun
Soil Preference: Well-draining soil
Zones: USDA hardiness zones 4–8
Planting Season: Spring after last frost
Planting & Sowing Instructions:
Indoor Sowing: Start seeds indoors 6–8 weeks before the last frost. Press seeds lightly into moist, well-draining soil. Germination usually occurs within 14–21 days.
Transplanting: Transplant seedlings outdoors after the last frost. Space plants 12–18 inches apart for healthy growth.
Direct Sowing: Sow seeds directly into prepared soil after frost danger has passed. Cover lightly with soil and water gently.
Care Tips: Water regularly to maintain even soil moisture. Deadhead spent flowers to encourage continuous blooming and maintain plant health. Mulch around plants to conserve moisture and moderate soil temperature.
Well-drained sandy or loamy soil in sunny locations
Harvest Advantages
Long-lasting blooms ideal for fresh and dried use
Plant Resistance
Excellent drought tolerance and good pest resistance
About Heirloom Eryngium Planum Flower Seeds
Scientific Name: Eryngium planum
Seed Names
Eryngium Planum Seeds, Sea Holly Seeds
Seed Type
Heirloom, Open-Pollinated, GMO-Free
Heirloom Eryngium Planum, commonly known as Sea Holly, is a hardy perennial admired for its striking steel-blue flowers and architectural form. With a long bloom season and strong drought tolerance, it is ideal for borders, pollinator gardens, and dried floral arrangements.
Planting Information
Light Requirement
Full sun
Planting Depth
0.5–1 cm deep
Sowing Method
Direct sowing or tray sowing
Plant Spacing
12–18 inches apart
Days to Maturity
90–120 days (blooms typically second year)
Soil Preparation
Cold stratification for 2–4 weeks recommended
Hardiness Zones
USDA Zones 4–9
Water Needs
Low to moderate; drought tolerant once established
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