Eryngium Planum Seeds produce perennial flowering plants known for their striking spiky blue flowers and silvery foliage. These hardy, drought tolerant plants thrive in full sun and well drained soils, making them ideal for garden borders, rock gardens, and container cultivation. They attract pollinators and add architectural interest to ornamental landscapes.
Features
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Perennial flowering plant with spiky blue blooms
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Drought tolerant and hardy
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Suitable for garden borders, rock gardens, and containers
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Attracts pollinators such as bees and butterflies
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Provides structural and seasonal interest
Specifications
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Scientific Name: Eryngium planum
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Common Name (US): Blue Star Sea Holly
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Seed Type / Variety: Ornamental blue flowering variety
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Growth Habit: Upright perennial flowering plant
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USDA Zones: 4–9
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Planting Season: Spring
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Growing Season: Late spring through fall
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Sowing Season: February–April indoors; transplant after frost
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Germination Time and Conditions: 14–21 days; light, well drained soil at 65–70°F
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Sunlight Requirements: Full sun
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Soil Requirements: Well drained moderately fertile soil
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Watering Needs: Low to moderate; drought tolerant once established
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Mature Plant Size: 18–36 inches height; 12–18 inches spread
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Plant Spacing: 12–18 inches apart