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These seeds have a best before date of 2022 making them perfect for sowing this year. See below for more information.

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Eryngium 'Big Blue' - 2L Plant



Catalogue Code: 5130-5252

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Sale price

Order Now - Delivery from late September

Regular price £18.99
An injection of intense blue thistle-like flowers is a great reason to grow this sea holly, which is well-suited to sunny borders and gravel gardens.

Key Features

  • Perfect for pots and containers
  • Good for cutting
  • Loved by pollinators
  • Hardy perennial
  • Prefers full sun

Pack Contents: 1 x 2Ltr Plant

Size: 100cm x 60cm

Height: 100cm


  • Big impact on summer colour
  • Attracts beneficial pollinators
  • Great in sunny borders, gravel gardens, prairie planting and wild gardens
  • Perfect for cutting
  • Good for mixing with other perennials
  • Holder of the Award of Garden Merit from the Royal Horticultural Society

For a long-lasting shot of intense colour, Eryngium ‘Big Blue’ is a real winner.

Its large cone-like heads made up of tiny flowers that are surrounded by a circle of spiny bracts. Great for mixing with other perennials in a sunny border. Its seed heads provide valuable winter interest.

Eryngium ‘Big Blue’ is a real eye catcher, growing to around a metre (39ins) in height and up to 50cm (20ins) in width and producing generous numbers of intensely blue flowers that stand out against green-grey foliage and are popular with bees and butterflies. They’re great for cutting too. Sea holly blooms for much of the summer and is tolerant of spells of dry weather. This perennial can be left to stand over the winter months, when frost brings a sparkle to its seedheads. Towards the end of the year this plant provides valuable winter sustenance for birds and shelter for insects. In colder areas it’s wise to mulch it well to protect its roots from extreme temperatures. Eyrngium x zabelii ‘Big Blue’ holds the Award of Garden Merit from the Royal Horticultural Society.

Sea holly is a fantastic plant for pollinating insects and birds love its seeds.

Tolerant of dry weather and will grow in most soils. Loves coastal areas.

How you will receive your plants: 

Selected by our team of experts and sent from our nursery, you will receive your plant in a pot, ready to plant out. 

Can’t plant straight away? 

Place the pot in a sheltered spot outdoors and water regularly to keep the soil moist. 

Planting in the ground: 

Dig a hole slightly wider than the rootball of the plant. Place the plant in the hole so that it sits at the same level in the ground as it did in the pot. When backfilling, mix in a soil improver such as well-rotted farmyard manure. Firm the soil around the plant and water well. 

Planting in containers: 

Choose a pot with good drainage holes. Place stones or crocks (bits of broken pottery) at the bottom of the pot to stop the drainage holes clogging up. Use a good quality compost. Feed and water container-grown plants regularly. 

Growing Calendar

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Plant Outdoors


Delivery to outside of Great Britain

We regret we are unable to deliver any products to non-mainland GB delivery addresses. This includes Europe, Channel Islands, Republic of Ireland, Northern Ireland, USA and Rest of World. We will update our website if this changes.

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