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Carlina acaulis |
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| Common name |
silver thistle |
| Family |
asteraceae |
| Life cycle |
perennial |
| Flowers |
silver-white (summer) |
| Size |
6" |
| Light |
full sun |
| Cultural notes |
good for alpine/rock garden. ordinary well-drained soil |
From seed  |
easy, germinates in a week or so at room temperature.
detailed seed-starting info below
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I keep this around for its different appearance and striking flowers. Plants last just a few years, and don't self-sow for me, so I grow new ones every couple years or so. The flowers are used by some to predict the weather, as they open and close in response to humidity levels.
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| The flowers proceed to dry on the plant, and last quite a while.
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This plant used to grow in our garden, but it slipped away... About my plant portraits
- Seed from '01 garden. Baggy 65F with light (70%G, 10-14d)
- Seed from '03 garden. Baggy 65F with light (80%G, 6-10d)
- Seed from '03 and '04 garden. Baggy 65F with light (76%G, 6-16d)
- Seed from '05 garden. Baggy 70F with light (58%G, 6-10d). Moving to warmth did not increase germination
The dried flowerheads are full of things that might be seeds. Only the very substantial, heavy things are viable. If you can press it flat with your finger, it is just chaff. A full flower yields surprisingly few seeds, in my experience.
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Last modified:
February 05, 2006
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