50 seeds 070069 £2.95 In stock
Items will be despatched in 5-7 working days.
1 x 9cm plant, for spring planting 511306-1 £7.95 Delivery early May
When in stock, please allow up to 2 weeks for delivery.
3 x 9cm plants, for spring planting 511306-3 £19.95 Delivery early May
When in stock, please allow up to 2 weeks for delivery.
More Details

Eryngium alpinum is a glamorous, blue-tinged, large-flowered sea-holly, Loved by Pollinators.

Eryngiums rank with euphorbias, poppies, sunflowers and Parrot tulips as my favourite plants for cutting and for the garden. The sculpted heads in steely grey or rich royal blue are hard to beat. Grow them and grow lots of them.

Genus Eryngium 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

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 on plantadvice@sarahraven.com (for advice on all things growing) or info@sarahraven.com for anything else.


Plant Delivery - When in stock, please allow up to 2 weeks for delivery.

Seeds Delivery - Items will be despatched in 5-7 working days.

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