Sorry, can't find the thread, but Kirk stated that colonies that had had the
seal of the lid cracked did not winter well in his cold climate.  On the
other hand, many suggest that top ventilation, via some sort of opening is
critical.

I have little experience in wintering in that kind of cold, except in those
years when I didn't get my bees out of my high Nevada yards by fall.  Kirk,
could you explain the difference between having cracks under the lid
propolis seal, and providing top ventilation.  Is it a wind issue, or what?

Thanks,
Randy Oliver

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