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Eryngium aquaticum

Eryngium aquaticum

Common name rattlesnake master; swamp eryngo
Family apiaceae
Life cycle perennial (Z6-8)
Flowers creamy white buttons (fall)
Size 3-4'
Cultural notes wet soils: swamps and bogs

Flowers look the same as E. yuccifolium, which explains the same common name - but this one grows in different soil conditions. Some sources list them as synonyms, but this one is clearly different, with a different leaf shape and growth habit. In its first year from seed, it is already a robust plant.
Update: it did not return the next year. Trying again this year.

We left this plant behind in our Pennsylvania garden (and wish it well); we don't grow it in Houston.

Read about all the eryngium species in our garden

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PlantLinks to other web pages about Eryngium aquaticum

Seed-starting details for this plant

  1. Seed from '04 HPS/MAG exchange. Baggy 70F (10%G, 20d)
  2. Same seed as above. Baggy 35F (4w) - 70F (16d) - 70F with light (6w; 10%G, 11-20d)
  3. Same seed as above. Baggy 35F (6w) - 70F (9d) - 70F with light (15d; no G)

Low germination with and without cold treatment. Maybe just a low-viability batch of seed.

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