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Eryngium giganteum

Eryngium giganteum
sea holly
Eryngium giganteum

Common name sea holly
Family apiaceae
Life cycle biennial
Flowers blue/silver
Light sun

The most well-known of the sea hollies, and the one with the most dramatic flowers. Through the years I've tried to grow two varieties from seed: the old standby 'Miss Willmott's Ghost' (several times), and a cultivar named 'Silver Ghost'. Out of all that effort, I so far have gotten exactly one blooming-size plant, featured in the photos here. I hope to establish a self-sowing colony – wish me luck!

sea holly

This plant used to grow in our garden, but it slipped away...

One or more images of this plant are included in my stock photo catalog

About my plant portraits
PlantLinks to other web pages about Eryngium giganteum

Seed-starting details for this plant

  1. Seed from '07 trade for 'Silver Ghost'. Baggy 35F (11w) - 70F (3w) - to pot outside.
    Seed from '07 trade for 'Miss Willmott's Ghost'. Baggy 35F (12w) - 70F (4w; 8%G, 13d) - pot outside on 4/1/08.
    Also pot outside 12/9/07, 1 seedling by April 10th
  2. Seed from '10 garden. Baggy 70F (3w) - 35F (12w; 20%G, 9-10w) - 70F (4%G, 9d).
    Baggy 35F (16w; 16%G, 13-14w) - 70F (8%G, 9d).
    Also seed for 'Silver Ghost' from '10 trade. Pot 70F on Feb 6, to outside Feb 27; seedlings noticed Apr 29
  3. Seed for 'MWG' ('10 garden) and 'SG' ('10 trade) to baggy 35F (12w) - 70F (17d; no G)

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