I overwintered two colonies of carniolan bees installed Easter 2017. Hives (langstroth 10 frame) are located in southern New Hampshire. One of the colonies is reduced to a cluster about the size of a fist - maybe even smaller. The queen is alive. She looks healthy. Examination of the adjacent frames show attempts to lay eggs during the winter. There are eggs and emerging brood that appears to have froze to death. Now this small cluster is presently to the far left of the upper deep brood box and the situation looks tough for successful brood rearing. There is plenty of honey, and over the weekend I placed a pollen patty next to the small cluster. Ventilation is good. The weather in southern New Hampshire is getting better but March always presents challenges.
Any suggestions on how to increase odds of survival?
(1) Is there an advantage if I placed the cluster in a nuc?
(2) If so, would it be a terrible idea to close up the nuc and place it in my basement where it is warmer appx. 40 deg. On warmer days, I could return the nuc to the original location (my backyard). Might this allow the brood a fighting chance with such a small cluster?
(3) Or do I just hope for warmer weather and see what nature selects?