I have a quick and easy method for inspecting my hives when it’s freezing cold outside like it is today. I take a quick peek under the hood to see how high the cluster has risen. It literally takes three seconds. Not much danger of chilling and killing the bees. When the cluster is so high that the bees are covering most of the top bars, it’s time to give them some sugar. Why? Because in my experience, the bees head to the bottom of the hive once the weather turns cold and gradually work their way to the top as they eat through their winter stores of honey. Usually the higher the bees are in the hive, the less honey they have and the closer they are to starving. (Usually, not always.)
All of my colonies live in 3-deep hives. Most of them seem to have between one and two deeps of honey to keep them alive all winter. Even though that’s more than enough honey, I have considered dumping sugar in all the hives just to be safe. But I think I’ll wait and see what happens. It would be wonderful to get through a winter without having to feed my bees, though chances are I’ll get paranoid and give them loads of sugar even if they don’t need it. My plan, if you can call it that, is to give them sugar perhaps even before the cluster is covering most of the top bars. As of today, though, nar a cluster is to be seen. And I hope it stays that way for the next few months (not likely).
Here’s a detailed copied-and-pasted entry from my beekeeping journal to illustrate what I’m talking about.
First up, 1505, a colony that was inadvertently started from a supersedure cell in July. The first sign of brood soaking in royal jelly from the naturally mated queen showed up around August 10th and I fed the colony sugar syrup until the end of October. It’s not what I would call a fully established colony, though not bad considering it’s only three months old.