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Rhaponticum coniferum

Rhaponticum coniferum

Synonym(s) Centaurea conifera
Family asteraceae
Life cycle
Flowers purple (late spring-summer)
Size 6-12"
Light sun
Cultural notes rich, well-drained soil
From seed germinate at room temperature
detailed seed-starting info below

Thistle-like plant, not commonly cultivated. I'm giving it a try to see what it's like. Just seedlings for now – the photo here shows a first-year plant in early July. I haven't found a good reference for its hardiness, but suspect it may not be up to our zone 6 winters. Certainly, the plants I started in 2013 did not return in 2014, so I'm going to hedge my bets and grow at least one plant on in a trough in our garage, which is probably equivalent to a zone 8 exposure.

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

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Seed-starting details for this plant

  1. Seed from NARGS '12/'13 exchange. Baggy 70F (82%G, 4-6d)
  2. Same seed as above. Baggy 70F (100%G, 4-11d)

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