Eryngium 'Neptune's Gold'
"Golden-leaved sea holly"
Orders placed before 1 September 2026
You can expect your order in August/September
Orders placed 1 September - 15 October 2026
You can expect your order in September/October
Orders placed 16 October - 15 December 2026
You can expect your order within 10 business days
Free tracked delivery
on orders over £50
Tracked delivery £4.99
on orders under £50
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Delivery to Northern Ireland
Tracked delivery £6.99
on orders under £50
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Description
Eryngium 'Neptune's Gold' is a sea holly with the volume turned up, pairing electric blue, thistle-like flower heads with intensely golden-yellow, spiky foliage. Known as the first golden-leaved eryngium, this striking perennial brings a bold flash of colour and texture to sunny borders, gravel gardens and prairie-style planting. The foliage and flower bracts of Eryngium 'Neptune's Gold' emerge yellow-green to gold, creating a brilliant contrast as the rounded blue flower heads develop in summer. Architectural, unusual and pleasingly dramatic, Eryngium 'Neptune's Gold' is perfect for adding definition among softer perennials and ornamental grasses.
Despite its rather theatrical colouring, Eryngium 'Neptune's Gold' is a practical, resilient choice for gardeners who like their plants distinctive but not demanding. It thrives in full sun and well-drained soil, where the golden foliage keeps its intensity and the blue flowers take on their strongest, most metallic tones. The spiny bracts give excellent structure, while the decorative seedheads continue the display into winter, looking especially good touched with frost. Plant Eryngium 'Neptune's Gold' with echinacea, salvias, achilleas or airy grasses for a confident contemporary scheme. Fierce in colour yet elegant in shape, Eryngium 'Neptune's Gold' is a true garden conversation starter.
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 'Neptune's Gold'ᴾᴮᴿ
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Flower colour
Blue, yellow, cream
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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, yellow, cream
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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 the Eryngium 'Neptune's Gold' roots in water for 3-6 hours prior to planting
Plant your "Golden-leaved sea holly" bare roots into temporary pots with a multipurpose compost within a week of delivery 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. Some varieties are a length of root which should be planted lengthways and shallowly (1-2cm deep).
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 September 2026
You can expect your order in September 2026Orders placed 1 September - 15 October 2026
You can expect your order in October 2026Orders placed 16 October - 15 December 2026
You can expect your order within 10 business days
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