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Eryngium x zabelii ‘Big Blue’ (Sea Holly)

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P9(9cm Pot)

1 Litre(13cm Pot)

3+ plants

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£30.00

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6+ plants

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£45.00

£58.00

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9+ plants

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Exceptional plants, better value

Mix & match • Create your own combination

P9 (9cm)

1 Litre

3+ plants

£25.00

£30.00

Save 5%

6+ plants

Most popular!

£45.00

£58.00

Save 10%

9+ plants 

£65.00

£80.00

Save 15%

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Plant information

Plant Description

Eryngium x zabelii ‘Big Blue’ is a striking perennial renowned for its architectural grey-green spiky foliage and unique thimble-shaped blue flowers. Its bold, sculptural form makes it a standout in borders, containers, or mixed perennial beds, adding structure and interest throughout the growing season. The nectar-rich flowers attract bees, supporting pollinators while enhancing your garden’s ecological value.

‘Big Blue’ is hardy in most conditions but benefits from protection during severe winters. Established plants can be lifted and divided in spring to maintain vigour and encourage new growth. In addition to its ornamental value, the spiky blue blooms make excellent cut flowers, bringing a modern, dramatic touch to floral arrangements. Versatile, low-maintenance, and visually striking, Eryngium x zabelii ‘Big Blue’ is perfect for gardeners seeking long-lasting colour, texture, and pollinator-friendly beauty.

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🌿 How to Care for Eryngium x zabelii ‘Big Blue’ (Sea Holly)

How much sun do Eryngium x zabelii ‘Big Blue’ (Sea Holly) need?
Eryngium x zabelii ‘Big Blue’ (Sea Holly) thrives in full sun—around six hours a day. While it can tolerate light shade, you’ll get the best flowering in bright, open spots.
Eryngium x zabelii ‘Big Blue’ (Sea Holly) prefers well-drained soil, ideally sandy or chalky. Rich or heavy soils can cause the plant to flop and reduce flower production.
Water well during the first growing season to help it establish. Once settled, Eryngium x zabelii ‘Big Blue’ (Sea Holly) is drought-tolerant and rarely needs extra water unless it’s extremely dry.
Eryngium x zabelii ‘Big Blue’ (Sea Holly) doesn’t require much at all. In fact, too much fertiliser—especially nitrogen—can lead to more leaves and fewer flowers. A light feed in spring is plenty, if needed.
Yes—regularly remove faded flowers from Eryngium x zabelii ‘Big Blue’ (Sea Holly) to encourage more blooms and stop self-seeding. You can cut the plant back in autumn or early spring to tidy it up and boost new growth.
Divide Eryngium x zabelii ‘Big Blue’ (Sea Holly) into clumps every 3 to 5 years in spring or autumn to keep them healthy and vigorous. You can also take soft cuttings in spring.
Yes, Eryngium x zabelii ‘Big Blue’ (Sea Holly)is drought handy. Once it’s established, it copes brilliantly in dry conditions, making it perfect for sunny borders and gravel gardens.
Eryngium x zabelii ‘Big Blue’ (Sea Holly) is generally low-maintenance, but it can occasionally suffer from aphids or powdery mildew—especially in humid or overcrowded spots. Good airflow and spacing usually prevent problems.

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