Closing Down the Apiary for Autumn

Winter losses are decided in September, not January. By the time cold weather arrives, the colony's fate is already set by the population of long-lived winter bees it managed to raise, the stores it has, and the mite load riding along with it. Autumn work is about getting those three things right, in the right order.

The Order Matters More Than the Tasks

Every autumn checklist contains roughly the same items. What separates a good autumn from a poor one is sequence:

1. Remove supers and finish harvesting
2. Assess and treat for Varroa
3. Assess stores and feed
4. Reduce entrances and secure the hive
5. Final check, then leave them alone

Treating before feeding matters because winter bees are being raised right now, and mites feeding on those developing bees shorten their lives. A colony that raises its winter population under heavy mite pressure enters winter with bees that will not last until spring, no matter how much syrup you gave them.

Step 1: Get the Supers Off

Take the harvest, then decide whether to leave a super of stores. In most temperate climates a well-provisioned brood box plus a shallow of sealed stores is comfortable. Leaving supers "just in case" gives the colony more space to heat than it needs.

Step 2: Varroa, With Numbers

Do an actual count before and after treatment. Autumn treatment is the one that protects the winter bees, and "I treated" is not the same as "the count came down". Follow the product instructions on temperature — several treatments are ineffective outside their stated range, and applying them anyway teaches the mites more than it kills them.

Step 3: Feed Early, Feed Thick

Heft each hive from the back. If it lifts easily, it needs feeding. Use thick 2:1 syrup so the bees expend less energy evaporating it, and finish feeding while the weather is still warm enough for them to process and cap it. Syrup taken down late and left uncapped can ferment.

Typical overwintering requirements vary hugely by climate — ask a local association what weight they aim for, and write that target in your records.

Step 4: Close the Entrance Down

A full-width entrance in autumn is an invitation. Reducing it does three things at once: it makes the entrance defensible against robbing when forage is gone, it keeps mice out once the cluster forms and the bees stop patrolling, and it cuts draughts through the brood nest.

Fit mouse guards before the first cold snap, not after. Once a mouse is in and nesting, the damage to comb happens quickly and the colony rarely evicts it.

Also check the roof is weighted or strapped, the stand is level and stable, and that nothing overhead will drop on the hives in a winter storm.

Step 5: Then Actually Stop

The hardest autumn task is leaving them shut. Every full inspection after the cluster starts forming costs the colony heat and stores it cannot easily replace. Once you have treated, fed, and reduced, restrict yourself to external checks: entrance activity on mild days, hefting for weight, and clearing dead bees from the entrance.

Write Down the Closing State

For each hive, record the final weight or heft assessment, the treatment used and its date, the queen's age, and your overall confidence in the colony. In March, that note is the single most useful thing you own — it tells you which hives to open first, and it tells you honestly which autumn decisions worked.