Re: CULT: stratifying seeds

  <<  How cold do they get 
  in a cold US winter? >>

  Jan, mine are in pots sitting on the ground with a light mulch of pine 
  needles.  It has been near 0 F.  I've never known it to get cold enough to 
  damage iris seed.  That's over the last 15 years. Today will be the warmest 
  day we've had since early Dec.  


  I can't remember what that is in Celcius. I think it is around 32 below zero? I don't think deep freezing would cause any damage. After all, they are worried about live bacteria being released from melted polar ice,  after hundreds of years in the deep freeze.



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