A striking, clump-forming perennial with spiny, blue-green foliage and metallic blue, globe-shaped flower heads held on upright stems. Eryngium planum is valued for its architectural form, long-lasting blooms, and drought tolerance, making it ideal for borders, gravel gardens, and naturalistic plantings.
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Exposure: Highly wind-tolerant; coastal tolerant if well-drained.
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Size: Typically 45–90 cm (18–36 in) high and 30–60 cm (12–24 in) spread.
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Soil: Prefers well-drained, sandy or rocky soil; tolerates poor and dry soils.
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Sun: Full sun for best flowering and compact growth.
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Flowering Time: Summer (June–August).
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Wildlife Benefits: Flowers attract bees, butterflies, and other pollinators; seeds provide food for birds.
