Eryngium 'Jos Eijking'
"Sea holly"
Orders placed before 1 March 2025
You can expect your order in February/March 2025
Orders placed 1 March - 15 April 2025
You can expect your order in March/April 2025
Orders placed 16 April - 15 May 2025
You can expect your order within 10 business days
UK orders over £50
Free shipping
UK orders under £50
£4.99
Northern Ireland orders under £50
£5.99
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Description
Add a touch of wild elegance to your garden with Eryngium 'Jos Eijking', commonly known as sea holly. Famous for its intensely blue stems and spiky, steely-sheened blooms, this perennial is a standout from summer to mid-autumn. The striking, thistle-like flowers bring both colour and structure, making Eryngium 'Jos Eijking' a perfect choice for adding drama and texture to borders, gravel gardens, or containers.
As tough as it looks, Eryngium 'Jos Eijking' syn. Eryngium 'Sapphire Blue' thrives in full sun and well-drained soil, even in less-than-ideal conditions. Drought-tolerant and wind-resistant, it’s an excellent addition to coastal or low-maintenance gardens. Its vibrant blue intensifies as the season progresses, providing eye-catching contrast against softer, more traditional blooms. Not only does Eryngium 'Jos Eijking' shine in the garden, but it’s also a favourite among pollinators, bringing bees and butterflies into the mix.
Whether used fresh or dried, its long-lasting blooms add a unique touch to floral arrangements. Officially named Eryngium × olivierianum 'Jos Eijking', this sea holly offers the perfect balance of rugged beauty and elegance, ensuring your garden stays interesting long after other plants have faded. Bring it into your garden for an edgy, season-spanning spectacle
Sea holly isn’t from the sea! Its spiky, blue blooms resemble underwater coral, adding a quirky, oceanic vibe to your garden without the saltwater.
Key features
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Good for cutting
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Comes back every year
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Fragrant
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Loved by pollinators
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Thrives well in full sun
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In peat-free compost
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RHS Award (AGM)
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Drought tolerant
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Fully hardy
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Rodent resistant
Specs & details
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Botanical name
Eryngium × olivierianum 'Jos Eijking' syn. Eryngium 'Sapphire Blue'
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Flower colour
Blue
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Plant size
1
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Established height
50-70cm
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Established spread
20-30cm
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Plant spacing
9 plants per m2
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Leaf colour
Green, silver, blue
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Habit
Upright
Clump-forming -
Life cycle
Perennial
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Hardiness
Fully hardy
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Years to establish
1-2 years
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Sunlight
Full sun
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Position
Sheltered
Exposed -
Suitable for
Borders
Coastal gardens
Cottage gardens
Cut flower gardens
Pots
Large containers -
Soil acidity
Any
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Soil moisture
Free draining
Dry -
Soil type
Loam
Sandy
Clay
Multipurpose compost
Loam-based compost -
RHS Award (AGM)
Yes
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Growing skill
Easy to grow
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Scented
Yes
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Pollinator-friendly
Yes
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Mouse resistant
Yes
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Rabbit resistant
Yes
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Deer resistant
Yes
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Toxicity
No report
Plant calendar
| Jan | Feb | Mar | Apr | May | June | July | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
- Planting
- Flowering
Useful information
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Soak your Eryngium 'Jos Eijking' roots in water for 3-6 hours prior to planting.
Plant your "Sea holly" bare roots into temporary pots with a multipurpose compost in spring and grow-on in a sheltered spot outdoors.
Choose a pot which comfortably fits the bare roots. Some have a noticeable crown which should be just below the soil surface with any top growth exposed.
Plant out into borders or permanent containers in late spring or early summer once in full growth. Choose a position in sun or shade depending on the variety.
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Orders placed before 1 March 2025
You can expect your order in Feb/March 2025Orders placed 1 March - 15 April 2025
You can expect your order in April 2025Orders placed 16 April - 15 May 2025
You can expect your order within 10 business days
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