Could the problem be alleviated by training the trees to grow at a somewhat SW angle? That would make5. Southwest injury is a big problem.
the angle of the trunk more accute relative to the sun and thus less heating.. I'm not experienced with the problem, nor live in as cold a climate. Just a thought.
Chris Mauchline
SE PA, zone 6
40° 5' N 75° 51'W
~650 ft elevation
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