Eryngium ‘Big Blue’ – A Striking Architectural Perennial
Eryngium ‘Big Blue’ is a bold, clump-forming perennial valued for its spiky, steel-blue thistle-like flowers that appear from mid to late summer. Its silvery-blue stems and textured foliage create architectural interest, while the long-lasting blooms add dramatic colour and contrast to borders, rock gardens, and mixed perennial plantings. Highly attractive to pollinators, ‘Big Blue’ provides structure, longevity, and low-maintenance impact in garden designs.
Why Grow Eryngium ‘Big Blue’?
Steel-Blue Flowers – Unique spiky blooms create striking visual impact.
Architectural Foliage – Silvery-blue, textured leaves add year-round structure.
Long Flowering Season – Mid to late summer colour.
Pollinator Friendly – Attracts bees and butterflies.
Low Maintenance – Hardy, drought-tolerant, and easy to grow.
Height and Spread
Typically grows to 60–90cm (2–3ft) in height, with a spread of 45–60cm (18–24in).
Where to Site Your Eryngium ‘Big Blue’
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Borders & Mixed Plantings: Adds height, texture, and colour contrast
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Rock Gardens: Architectural interest and bold form
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Cut Flower Gardens: Long-lasting blooms perfect for arrangements
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Pollinator Gardens: Supports bees and beneficial insects
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Drought-Tolerant Plantings: Performs well in dry, well-drained soil
How to Grow and Care
Soil – Prefers well-drained, neutral to alkaline soils; tolerates poor soils.
Light – Full sun for best flowering and compact growth.
Watering – Water young plants until established; drought-tolerant once mature.
Maintenance
Deadheading: Remove spent flowers to maintain appearance and prolong blooms.
Pruning: Cut back foliage in late winter to tidy the plant.
Mulching: Optional; can help retain moisture in summer.
Pests & Diseases: Generally pest- and disease-free.
Perfect Plant Combinations
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Grasses: Stipa, Miscanthus, Festuca
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Perennials: Salvia, Echinacea, Achillea
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Shrubs: Lavandula, Artemisia
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Bold Colour Schemes: Pair with whites, purples, and silvers for contrast
Conclusion
Eryngium ‘Big Blue’ is a striking, architectural perennial with steel-blue flowers and textured foliage. Ideal for borders, rock gardens, and pollinator-friendly plantings, it delivers dramatic colour, long-lasting blooms, and minimal maintenance.
Does the height include the pot?
No, we measure from the top of the pot to the tip of the plant except for some of the instant planted screens, in this case it will be stated in the description
How long does delivery take?
Most orders are delivered in just a few days, Smaller items are often sent with Parcelforce on a next day service, Larger items should allow up to 10 days due to the size of the items they often have to be sent on our own transport.
Where will you leave my plants?
We will leave your order at the front of your property, Parcelforce may
leave your items in a safe place if you let us know, Pallet couriers
will require a flat hard surface to deliver to, no gravel or soil, a
driveway or parking spot would be best. Most importantly Deliveries by
pallet courier will require access for a large truck (bin lorry sized)
to get near the delivery point. Deliveries sent on our own transport may come in a small van or larger truck.
