09/03/2026
Autumn hive checks:
Summer looks to be winding down here in N. Idaho as the daytime highs are now dropping off while nighttime lows are dropping into the 50's and even the high 40's. That means it is time to start inspecting and prepping your colonies for the upcoming winter.
You will want to ensure that you leave enough honey on your strong colonies and boost the supply of honey/nectar on those who are weaker. Up here in the north, you will generally need around 85 pounds of honey for a strong colony to overwinter upon. I prefer to err on the side of leaving more and not less.
If you need to feed syrup, then make sure you get it on quickly while daytime temperatures are still warm. Most beekeepers unfortunately wait too long to begin feeding syrup. Between not mixing a thick enough syrup and getting it on too late, the bees do not have enough time and temperature necessary to evaporate excess moisture out of it. That results in far too much moisture in the colony. Remember - excessive moisture is what kills bees in the winter - they can deal with cold but once they get wet, they are finished.
You might ask -how does excessive moisture harm them? Bees do not hibernate during the winter. Instead they form a cluster and consume their supply of honey to provide carbohydrates so that they can generate heat in the cluster by vibrating their wing muscles. Their breathing releases moisture into the air and being that it is warm from the cluster, it rises. As it rises, it can come into contact with the cold bottom surface of the outer cover. Warm, moisture-ladened air, hitting a cold surface, causes water to condense in the form of droplets on the bottom of the inner cover. That in turn can literally rain down upon the poor cluster of bees beneath it. At that point, your colony is doomed.
Feeding sugar syrup too late in the season simply aggravates this problem increasing the odds of your bees getting soaked.
One of the ways you can help your bees to avoid this, ( most importantly - do not feed sugar syrup that is too thin or feed it too late) is to provide "attic insulation" and good ventilation. Just like your own home has insulation in the attic above your ceiling and between it and the roof, you can do the same for your bees. There are a variety of ways to do this. I personally use shallow supers with 1/8" hardware screen as a bottom base, filled with absorbent material such as wood chips. I also use the material found in pet care shops that are used for hamster cages. Make sure if you use this that it is an unscented variety. That stuff is manufactured specifically to absorb moisture and is terrific for use in beehives.
You can purchase wintering boxes to add to your colonies so for those who are not particularly interested in making their own products., invest in those for your colonies. But do make sure you get something similar on your colonies. It helps the bees to moderate the temperature of their cluster as well as absorbing excess moisture.
I can provide more info on this in an additional post but I do want to also give an additional pointer for what to look for ahead of the winter. Check to see that your bees do have some pollen stores in frames near their brood chamber area. If they do not, get some supplemental pollen substitute on them now. I do not feed pollen patties during the depth of winter. Only ahead of the winter. I do feed pollen patties in late winter on a milder and sunny day to provide the bees with the protein source for the new larvae that they will be rearing in the buildup towards spring. IN the depth of winter however, the amount of brood they are rearing is negligible so they require more carbohydrates rather than protein.
Lastly,make sure that your colony has a queen present and that you see signs of brood. You do not want to have a queenless colony going into winter. They are dead and just don't know it yet. Sadly, one can rarely obtain mated queens late in the fall so if you do run into a situation where a colony is indeed queenless., combine it with another existing colony.