Eryngium alpinum

A glamorous, large-flowered sea-holly with sculpted heads in steely grey or rich royal blue. Hard to beat and loved by pollinators. More
50 seeds 070069 £2.95 In stock
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Following the recent relocation of our warehouse, please allow up to 5 working days for despatch.
1 x 9cm pot, for spring/summer planting 511306-1 £7.95 Delivery mid April
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When in stock, please allow up to 3 weeks for delivery. 
3 x 9cm pots, for spring/summer planting 511306-3 £19.95 Delivery mid April
[?]
When in stock, please allow up to 3 weeks for delivery. 
More Details

A glamorous, large-flowered sea-holly with sculpted heads in a steely grey or rich royal blue. Hard to beat and loved by pollinators.

Genus Eryngium
Group/Species alpinum
Type Hardy Perennial
Common Name Sea Holly
Border Position Back, Middle
Soil Type Neutral
Scent Unscented
Site Full Sun
Moisture Moist but Well-drained, Well-drained
Height 75cm (30in)
Spacing 45cm (18in)
Sowing, Seeds, Planting Direct sow March-April and/or August-September. May need a warm-cold-warm cycle and may be slow to germinate, taking up to 80 days. Sow in the autumn for best results, in shallow pans in light soil under a cold frame. Grow seedlings on until large and strong enough to be planted outdoors into its final position in the garden. Choose a spot with fairly dry, well-drained soil that is poor to moderately fertile. Full sun is essential as is protection from winter wet. This also grows well in container pots.
Care Tips Leave the attractive seedheads on over winter. Tidy dead and decaying foliage in early spring.
Flowering July - October, the following year
Vase Life Give eryngiums a long drink in deep water. They should last for 2 weeks. Or dry in time for your Christmas table.
Harvesting Flower production: 12 weeks.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • Sow Under Cover/Plant Indoors
  • Direct Sow/Plant Outdoors
  • Flowers/Harvest
Advice

We don't currently have additional advice on using / growing this particular product on our website, but if you do have a question that isn't answered on this page then please give us a call on 0345 092 0283 and we'll happily chat through any queries you may have, or email us at info@sarahraven.com. Please note all email replies are taking up to 10 working days.

Delivery

Plant Delivery - When in stock, please allow up to 3 weeks for delivery. 

Seeds Delivery - Following the recent relocation of our warehouse, please allow up to 5 working days for despatch.

Click here to find out more information about our delivery rates and times.

Eryngium alpinum reviews

* * * * * Average based on 7 reviews

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Reviewed 8th August 2019 by Sally

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Reviewed 31st July 2019 by Elaine

Not planted yet but last years plants are amazing

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Reviewed 31st July 2019 by Deborah

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Reviewed 31st July 2019 by Christina

Arrived in good condition and all growing well.

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Reviewed 31st July 2019 by Gilly

Very good. Despite being very small, it is doing well.

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Reviewed 31st July 2019 by Karen

These seeds did not germinate sadly.

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Reviewed 31st July 2019 by Katie

Slow growing but healthy and doing well so far