I made some late splits this year to barter with, and kept one. They are in a 3-story nuc, and I had planned to move them into to a regular box, but never got around to it. Several people said they should do fine, so this will be my first attempt at overwintering a nuc box.
We had our first frost this week, with daytime temps in the 40's and 50's. All the other colonies are flying, but not a single bee has come out of the nuc. It almost looks dead.
After no life since Monday, I decided to check on them and insulate if they are still in there. Last year, I insulated my 4 hives, and they all survived and came out of winter booming.
So, today I checked on them. I took a quick peek and saw some bees, not moving much. They looked cold. I cut some R-13 to fit and taped it into place. Then I took some black 6-mil plastic and made a fitted cover that I could drop over the box to keep the insulation dry, catch some solar heat and mainly block the wind. I didn't make it super tight, but I am pleased at how it came out. Looks like something you would buy. I'll take some pics tomorrow.
I've heard several say to not wrap your hives with plastic. What is the consensus on this? I don't normally do it on my regular sized hives, but this one seemed to need all the help it could get.
I've heard some say they have never gotten a nuc to survive winter and others say it's no big deal.