Seasonal Management

Fall Beekeeping Guide: September Through November Tasks

By Scout Theory · May 2026 · 12 min read

Fall is when winter losses are decided. Not January. Not February. September and October. The decisions you make now — mite treatment timing, feeding, consolidation, and winterization — determine whether your colony is alive in April or becomes a statistic in the Bee Informed Partnership's annual loss survey.

This guide covers every task from the end of the honey flow through the first hard freeze, organized month by month.

September: The Critical Month

Mite Treatment — Your #1 Priority

If you have not already treated for varroa, do it now. September is the last reliable treatment window before your colony raises winter bees — the long-lived bees that must survive from October through March. Winter bees parasitized by varroa during development emerge weakened, virus-loaded, and short-lived. A colony entering winter with high mite loads almost always dies by February.

Test first (see our varroa testing guide), then treat based on your count. At this point in the season, treat if you are above 2 mites per 100 bees — the threshold is lower in fall because there is no time left for exponential growth. An oxalic acid vaporizer gives you fast, effective treatment with multiple applications over 2–3 weeks.

Assess Honey Stores

Your colony needs 60–90 pounds of stored honey to survive winter (depending on your climate — northern states need more). A full deep frame weighs about 8–9 pounds; a full medium frame about 5–6 pounds. Heft each box from the back to estimate weight. If stores are light, begin feeding 2:1 sugar syrup (2 parts sugar to 1 part water by weight) immediately. Use an in-hive feeder or top feeder — not an entrance feeder, which invites robbing.

Remove Empty Supers

Pull any empty or partially empty honey supers. The colony should be consolidated into the minimum number of boxes they are actually using. Extra boxes mean extra space to heat, extra room for wax moths, and extra work for a shrinking population of bees.

October: Winterization

Install Mouse Guards

As temperatures drop, mice seek warm shelter — and your beehive is exactly the right temperature with a built-in food supply. A mouse guard (a metal strip with bee-sized holes that blocks the entrance) should go on before the first frost. Mice can destroy comb, disturb the cluster, and urinate on frames, all of which stress or kill colonies.

Add Moisture Management

Moisture kills more colonies than cold. Warm air from the cluster rises, hits the cold inner cover, and condenses into water droplets that rain back down onto the bees. Cold bees can survive. Wet cold bees cannot.

The solution is ventilation and moisture absorption. A moisture quilt box sits above the frames and contains absorbent material (wood shavings or burlap) that wicks moisture away from the cluster. Alternatively, tilt the hive slightly forward so condensation runs down the front wall and out the entrance instead of dripping onto bees.

Reduce Entrances

Switch to the smallest entrance reducer setting. A small entrance is easier for the reduced winter population to defend against robbers and keeps cold wind from blowing through the hive.

Insulate (Where Needed)

In climates with sustained temperatures below 20°F, wrapping hives with a winter hive wrap provides insulation that reduces the energy bees spend heating the cluster. Dark wraps also absorb solar heat on sunny winter days. In mild climates (Zone 7+), wrapping is generally unnecessary.

November: Leave Them Alone

By November, the colony should be configured for winter: treated for mites, fully fed, consolidated, mouse-guarded, moisture-managed, and wrapped if needed. Your job now is to leave them alone.

Do not open the hive once temperatures are consistently below 50°F. Every opening breaks the propolis seal the bees have built and disrupts the cluster. Check from the outside only: listen for buzzing on warm days, watch the entrance for cleansing flights, and heft the hive from the back occasionally to monitor weight (stores).

If the hive feels dangerously light (you can lift the back easily with one hand), place a candy board or fondant directly above the cluster as emergency feed. This is a last resort — if you are doing this, something went wrong with fall feeding.

Fall Checklist Summary