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Rooting dormant raspberry cuttings

 
Posts: 135
Location: Northern Colorado
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I recently requested germplasm of some rare native raspberry brushes from the USDA grin database. They send them bare without roots and I assume in a dormant state as I couldn't even request them until Sept 1.

I have two books on woody plant propagation since I can't afford these cuttings to fail. I'm starting a raspberry breeding project.

I think I'll go with half peat, half perlite, and keep them in sealed bags to keep in moisture. The heated mat and cool tips sounds good,  but do I keep them indoors or outdoors the whole winter? In dark or sunlight?

Any tips would be appreciated.
 
steward
Posts: 5145
Location: Cache Valley, zone 4b, Irrigated, 9" rain in badlands.
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My general strategy for rooting cuttings is to root them in pure coarse sand. I suppose that if it were me, that I'd dig a hole outside, fill it with sand, stick the cuttings into it, and make sure that they stay damp until they root and sprout. Perhaps, I'd fill a pot with sand, and bury that in the ground outside. Raspberries thrive in partial shade, so I'd try to mimic that in my planting.

 
Andrew Barney
Posts: 135
Location: Northern Colorado
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Thanks.  I think I'll try something like that with a pot.

From what I read the most important is drainage (pore space) and moisture.
 
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