Get Your Hive Ready for Winter: A Plain Guide for the First-Year Beekeeper

Most colonies that die over winter do not freeze to death. They starve, they drown in condensed moisture, or they are weakened by mites before the cold even arrives. None of that has to happen to you.

For a beekeeper in Zone 7, winter prep is mostly a fall job. It is a handful of straightforward tasks done at the right time, and they make the difference between opening a hive in March to find bees, or opening it to find an empty box.

This guide walks through the whole job: timing, mite control, making sure the colony has enough food, keeping moisture from killing the cluster, and reducing the entrance without trapping the bees.

Why Fall Prep Matters So Much

Beekeepers say that summer beekeeping grows honey, and fall beekeeping grows bees that survive. That is a fair way to think about it.

The population of a colony peaks in July and then starts to fall. The mites in that hive, by contrast, keep climbing well into late summer. So by the time the bees are gearing down for winter, the mite-to-bee ratio can turn sharply against them. If you start your mite control in October, it is already too late to do much about the damage.

The practical takeaway is simple: the work that decides whether your colony lives through winter happens in August and September, not in January.

Varroa Mites Come First

If you have bees, you have varroa mites. It is not a question of whether, only of how many and when you act.

Because mite numbers keep rising after the bee population starts to fall, your best move is to measure mite levels in late July or early August and treat promptly if they are high. In a typical year, that means counting mites on a sample of bees and treating the colony before the numbers do the damage.

• Measure your mite load in late summer, not late fall.
• If you do not have time to test every hive, treat anyway. Treating all your colonies is better than losing weak ones.
• Apply the treatment that matches your situation and the label directions. Common fall options include thymol-based gels and tablets, formic acid strips, amitraz strips, and oxalic acid.
• Re-check in September. If mite numbers are still high, treat a second time with a different product before packing the hive for winter.

One caution: some mite treatments cannot be used while you have honey supers on the hive, and a few require a waiting period before you can harvest. Read the label before you treat and plan your fall around it.

Make Sure They Have Enough Food

Winter bees are in a tight cluster and only leave it to move to new frames of honey. If they run out of stored food in February, they can starve even when the hive next door still has plenty. Their world becomes very small, so they need their food close by and already capped.

How much honey a colony needs depends on how hard your winter is. In a middle climate like Zone 7, plan on roughly 50 to 60 pounds of stored honey for a full-sized colony. In milder spots you can get away with less, and in harder winters you want more. When in doubt, leave more rather than less.

You can gauge the situation without weighing the hive:

• A fully drawn deep frame filled with honey holds roughly 6 to 8 pounds.
• A good rule for Zone 7 is to leave the bees a full deep box of stores as a floor, and add more if the colony is strong or the winter forecast is rough.
• Do not take honey from the brood nest. Leave the food sitting right where the cluster can reach it.

If the colony does not have enough stores before the last nectar flow ends, feed them. From late summer into early fall, while daytime temperatures stay above about 50 degrees Fahrenheit, feed a heavy 2:1 sugar syrup.

• Heavy syrup is two parts sugar to one part water by volume.
• Keep feeding until the colony has put away enough.
• Stop feeding liquid syrup once freezing temperatures arrive. Cold bees cannot easily cure and store liquid syrup, and it only adds moisture they do not need.

Do not feed in winter if you can avoid it. A dry sugar or fondant emergency feed can help a starving colony, but the real job is building the stores up in the fall so that emergency is never needed.

Moisture Kills More Colonies Than Cold

Healthy winter bees can survive surprising cold. The cluster shivers to generate heat and keeps its core warm. What the cluster cannot handle well is being dripping wet.

A wintering colony gives off a surprising amount of moisture, in the range of several grams of water per hour, as the bees breathe and metabolize honey. In a sealed hive, that moisture rises, hits the cold inner cover, condenses, and drips back down onto the cluster. Wet bees chill fast, and a wet, cold cluster can die even in a mild winter.

Because of this, upper ventilation matters more than most beginners realize:

• Give the moisture a place to escape near the top of the hive, usually by slightly propping or notching the upper entrance and ensuring air can move out through the top.
• Insulate and manage the top of the hive so condensation does not form right over the cluster and drip down.
• Many beekeepers put a thin feeder shim or a notched inner cover above the brood nest to give the cluster an escape route for humid air and a place to break cluster.

The exact approach varies, and your local bee club or a mentor can show you what works in your area. The principle is steady across regions: keep the cluster warm but dry, and give moisture a way out the top.

Reduce the Entrance, Keep Out Mice

In late fall you want to shrink that wide summer entrance down to a small opening. A reduced entrance helps the bees defend the hive, keeps out robbing bees and wasps in the fall, and helps the colony hold heat in winter.

• Install an entrance reducer once the colony has stopped bringing in much nectar, usually as cool weather settles in.
• Set it to the smallest position for winter.
• Leave a little airflow through the entrance, since winter bees also need some ventilation at the bottom.

A smaller entrance also pairs with a mouse guard. Mice love a warm hive full of honey frames in winter. A guard made of hardware cloth or a metal strip with small holes lets bees pass but keeps rodents out. Fit it snugly so a mouse cannot squeeze around the edges.

Check, Fix, and Don't Disturb

Before the cold settles in, do a final inspection on a mild day:

• Confirm the queen is present and the colony is strong enough to winter.
• Confirm food is stored where the cluster can reach it.
• Replace or repair any boards, joints, or frames that are warped, cracked, or drafty. Small gaps let heat and moisture escape in the wrong places.
• Remove anything that is dead, moldy, or rotting, so it does not spread problems over the winter.

Once you have done your fall work, the rule changes. Winter is not a time to open the hive. Every time you pop the top in January, you dump the warm, humid air and disrupt the cluster. Let them be. Your job shifts from doing to watching.

On the few mild, calm days of winter, you can still do useful small things from the outside: heft the back of the hive to feel roughly how heavy it is, clear snow away from the entrance, and make sure the entrance stays clear of dead bees and debris. That is about it until early spring.

What Success Looks Like

A well-prepared colony in Zone 7 enters winter with a strong cluster, a young and healthy queen, a full set of food stores, mite numbers under control, and a hive that stays dry and draft-free at the top.

None of that is fancy. It is mostly timing and a little care done in August, September, and October.

Start this fall, and when you first check the hive on a warm day in March, the reward is a cluster of living bees crawling across the frames. That is the whole point of the work, and it is worth doing right.

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— C. Steward 🍎