Tom, all that I've ever heard is that you must let the trees reach full dormancy before pruning especially if making big flush to the trunk cuts. First week of December is almost always a safe time to start. I know some growers will tell their pruning crews that damage occurs if they prune when the temp is below a certain point but I think that's just an excuse to keep them from working when it's too cold and their productivity is impaired.
Bill Fleming Montana State University Western Ag Research Center 580 Quast Ln Corvallis, Montana ________________________________ From: apple-crop-boun...@virtualorchard.net [mailto:apple-crop-boun...@virtualorchard.net] On Behalf Of KD LINNEY Sent: Wednesday, February 02, 2011 12:35 PM To: apple-crop@virtualorchard.net Subject: [Apple-crop] low temp pruning Is there research or even anecdotal evidence that suggests a fairly definite low temperature at which to cease pruning apple or other fruit trees in consideration of impaired wound healing or any other potential tissue damage? I'm thinking of mid-winter when trees are still quite dormant, but also during cold snaps later in the season. Thanks. Tom Moss Rollins, Montana
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