Over wintering a few Nucs is something I have done for a couple of years. I never gave it much thought other than I had good success doing it and full size hives from over wintered Nucs are very strong. Nuc production has been almost an after thought around the bee yard and something I did not spend much effort producing. I have for many years made splits to help control swarming, grow my hive count and back fill for losses. Nucs were almost just left overs from the Spring management process.
After watching The Sustainable Apiary by Mike Palmer, I now want to actively produce Nucs. I found this talk that he gave at the UK’s National Honey Show to be very enlightening. Thank you to Mr. Palmer and the people that made the video available.