Question about butterfly bush & columbine

Central, KY(Zone 6b)

Does anyone know if butterfly bush Nanho Purple or Ile De France will come true from seed?

Also, has anyone grown columbine Nora Barlow from seed? I collected some earlier and after 16 days they have not sprouted. They are surface sown and kept moist. I have read on 1 site that they should be frozen for 5-7 days first, but have not seen this info anywhere else.

Thanks much for any help : )
Vicki

Westbrook, ME(Zone 5a)

Sometimes columbines do benifit from a cold spell. If you can stick your tray in a plastic bag and refrigerate for a few weeks it might help.

Central, KY(Zone 6b)

Thanks poppysue, will do.

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