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Eryngium planum |
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| | Viable seeds are plump, feathered arrowheads |
| Common name |
flat sea holly |
| Family |
apiaceae |
| Life cycle |
perennial (Z5-9) |
| Flowers |
steel blue |
| Size |
3' |
| Light |
full sun |
| Cultural notes |
well-drained soil; drought-tolerant. |
From seed  |
give several weeks cold, then germinate at room temperature
detailed seed-starting info below
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Striking! Both the flowers and the stems are blue. Good bee and butterfly plant (and wasps too, as the great golden digger wasp in the photo demonstrates). Plants are tap-rooted, and tricky to move.
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| Remaining rosette in December
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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 About my plant portraits
PlantLinks to other web pages about Eryngium planum
Some particularly helpful links to other websites
Visitors to this page have left the following comments| Jennifer | Mar 31, 2022 | I love this page on Eryngium planum, your photo is fantastic. I also love the simple yet thorough coverage of the topic. I would emulate your page if making a similar one. Also like your colors and that your page isn't over produced.
Thanks
Thanks for your comments, Jennifer. This must have been one of my very first plant portrait pages - I kept my secondary photos small in those days, because of server space restrictions. |
- Seed from '06 garden. A: Baggy 70F (4w; 20%G, 7d).
B: Baggy 35F (9w; 10%G in 9th wk) - 70F (20%G, 3d)
Cold requirement isn't so clear from the results above.
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