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Can I propagate Comfrey in October in Chicago?

 
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I'm just wondering- I have a large comfrey plant behind my shed. I want to split it and propagate the root into 4 or so new plants for under my cherry tree. It's starting to dip into the upper 30s/low 40s at night. Should I wait till Spring or is it ok to do this now?
 
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Based on my experience, comfrey roots survive just about anything short of sitting in water for months at a time. I've propagated plants in the fall before and they've come up in the spring. But I'd be willing to bet they'll do better if you were to wait until the spring.
 
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Nathan Strumfeld wrote:I'm just wondering- I have a large comfrey plant behind my shed. I want to split it and propagate the root into 4 or so new plants for under my cherry tree. It's starting to dip into the upper 30s/low 40s at night. Should I wait till Spring or is it ok to do this now?




I'd yank it, cut it up, replant it, and throw some chips down, that way it will be ready to pop in spring.   My experience with Comfrey is it's darn near bullet-proof.  If you don't want to take a chance just do it in the spring.  I planted 5 root bits in spring and I have around 15 comfrey plants in my yard now.  I'm planting comfrey next to every tree so I can just chop and drop.
 
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Your Comfrey will propagate just fine...Put some manure in your planting holes and water it well.
 
Nathan Strumfeld
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Thanks for the replies! I'm gonna give it a shot. I already have 4 chive plants right at the base of my cherry tree. I want to add the comfrey, and then a few nitrogen fixers.
 
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I'll be the voice of caution here.

Will the new plants have enough time to get established before the hard frosts of winter come?  My fear is that those cuttings will freeze all the way through and the ongoing freezing and thawing over he next 5 months will kill those cuttings before they get a chance to root.

If it were me, I'd leave the plant in the ground for the winter, and then go ahead and spit it come spring time.  Or, if you've got a sun room or south-facing porch where it doesn't get so cold, perhaps plant those root chunks in well-draining potting mix (like a 50/50 mix of cactus mix and potting soil) and let them overwinter in a warmer place.  You aren't going to get much more than a couple of weeks of growing season before freezing weather renders them a dormant, so dividing them and planting them now just feels like there is no advantage whatsoever.  

Just because it might possibly survive the winter doesn't seem like a good enough reason to do it now.  Patience, grasshopper.  It'll only take you 20 minutes to do the very same thing next spring.    
 
Nathan Strumfeld
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Thanks for the advice Marco. It is a good point, especially since the temperature took a dive last night. My wife was a little upset this morning because I hadn't turned the heat on yet and it was 2 degrees above freezing outside!
 
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Either way would probably work, but I don't think you'll gain much by doing it now as opposed to spring.  It isn't going to do much growing this fall.  I would wait and do it in early spring.

If it's a large plant as you say, you can easily get 20 or 30 plants from it if you want that many.  Every root cutting will grow a plant.  If you want them to get big faster, do it as you say and use crown cuttings.
 
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