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Eryngium leavenworthii

Eryngium leavenworthii
Leavenworth eryngo
Eryngium leavenworthii

Common name Leavenworth eryngo
Family apiaceae
Life cycle annual
Flowers purple
Size 3'
Light sun
From seed germinate at room temperature
detailed seed-starting info below
Seed ripenslate October

Wildflower of south-central United States. The only annual eryngo we've tried thus far, this looks to be a stunner with its purple flowers; a departure from the greenish-white to steely-blue spectrum of the perennial species we grow.
Through the middle of summer, the plants grew large and bushy, and somewhat floppy, with lots of green flowers-in-waiting. Then in mid-August, some of the bracts turned purple. By late August, many flowers were purple from head to toe. Finally, toward mid-September, the real deep purple arrived. All in all, quite a plant! I hope it sets viable seeds...

Leavenworth eryngo
Starting out looking like prickly bolting lettuce in June

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

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

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Seed-starting details for this plant

  1. Seed from '05 trade. Baggy 70F (67%G, 11-16d)
  2. Seed from '07 garden. Baggy 70F (no G, 4w)
  3. Seed from '08 garden. Baggy 70F (25d) - 75F (27d; no G)

The plants in our '07 garden self-seeded, so there must be viable seeds set - but they are either few and far between, or their germination requirements aren't met by my attempts to start garden-collected seed.

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Last modified: March 29, 2009
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