Sea Holly 'Big Blue' {1-Gallon pot}

Eryngium × zabelii 'Big Blue' (AKA Eryngium × olivierianum 'Big Blue', Zabel Sea Holly 'Big Blue')
Pronunciation: eh-RIN-jee-um zah-BEL-ee-eye BIG BLOO
Product: 200912
Shipping description: This product cannot be shipped to ID, and cannot be shipped from early May to early October to AZ, CA, MT, NV, OR, UT, or WA.
NOTE: Shipments to AZ, CA, MT, NV, OR, UT, or WA require 7-10 days to prepare the required paperwork.

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1 - 9: $33.47 each10 - 99: $31.80 each
100+: $30.12 each
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Content note: AI-assisted: Some images, descriptions, or plant specifications on this page may have been created or revised with the assistance of AI. This content is checked, but inaccuracies may remain.

Please also note: Flower and foliage colors can vary considerably depending on climate, season, sunlight, myriad other growing conditions, and photography. If this plant is new to you, or you would like a broader sense of its natural color range, please view additional photographs [here], and feel free to contact us with questions.
Eryngium × zabelii 'Big Blue' (sea holly) brings dramatic, iridescent blue flower heads with spiny bracts to your garden in summer. You will get an upright, clumping perennial with bold texture for borders, gravel gardens, and cutting beds, plus excellent dried stems for arrangements.

Give it full sun for the strongest color and the sturdiest stems. Plant it in dry to average, well-drained soil - sandy or gravelly sites are ideal. Once established, it tolerates drought and heat far better than rich, moist conditions, which can cause sprawling growth. Water regularly the first season, then let the soil dry slightly between deep soakings.

Mature size is about 24-30 inches tall with a spread around 24-30 inches, making it easy to tuck into mixed plantings without crowding. Leave it undisturbed if possible, since sea hollies dislike frequent transplanting. A light spring cleanup and an optional late-season cutback after bloom are usually all it needs.

Pollinators will work the flowers when they are in peak color, and the spiny foliage helps it shrug off browsing in many landscapes. Pair it with other sun lovers and airy companions so the steel-blue tones stand out and the stems stay upright and neat.

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