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Post new topic   Reply to topic    Irish Gardeners Forum Home -> Perennials, Ferns and Ornamental grasses

seed propagation


 
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gerhoe
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Joined: 15 Jul 2011
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PostPosted: Wed Nov 30, 2011 9:56 pm    Post subject: seed propagation Reply with quote

I was intending to grow penstemon plants from seed this coming season. The catalogue notes re the seeds...."sow and then chill for three weeks". It seems an unusual instruction. Does somebody out there know exactly the reason for that instruction ?
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dormouse
Rank attained: Rowan Tree
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Joined: 05 Oct 2011
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Location: North Dublin

PostPosted: Thu Dec 01, 2011 10:15 am    Post subject: Reply with quote

It's called stratification. With some seeds you need to replicate a cold winter spell to help them break dormancy. Chilling them fools them into thinking spring is here when you take them out.
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