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How Much Food Do Bees Need for Winter? UK Guide

As a practical UK target, a full-sized honey bee colony should generally enter winter with about 20kg of usable honey or syrup stores. The National...

As a practical UK target, a full-sized honey bee colony should generally enter winter with about 20kg of usable honey or syrup stores. The National Bee Unit gives a broader guide of roughly 18–22kg, while noting that large or prolific colonies may need more. This is a starting point rather than a guarantee: colony size, hive type, local climate, brood rearing and the length of winter all affect consumption.

September is the time to assess what each colony already has and make up any shortfall while the weather is still warm enough for bees to take down and process syrup.

How much food does a colony need?

The National Bee Unit’s current winter-preparation guidance uses approximately 20kg of honey as a general autumn target. Its sugar-feeding guidance gives a range of 18–22kg for winter stores, with extra allowance for larger colonies headed by prolific queens.

Do not treat every hive identically. A strong colony occupying a large brood area may consume more than a modest colony, while a small but healthy colony may need less. A long, mild winter can also increase consumption because bees remain more active and may continue rearing brood.

What does 20kg of stores look like?

You do not need to remove and weigh every comb. The following National Bee Unit figures provide a useful guide:

  • A full British Standard National brood frame holds about 2.3kg of honey.
  • A full super frame holds approximately 1.2kg.
  • A full National super should contain at least 12kg of honey.

On that basis, one full super plus three full brood frames contains roughly 19kg of stores. Frames are rarely filled perfectly, however, so assess the proportion of sealed stores on both sides rather than simply counting frames.

Remember that pollen, empty comb, brood, bees and wooden equipment all add weight. The object is to estimate accessible carbohydrate stores, not the total weight of the hive.

Count frames first, then learn the heft

During a suitable autumn inspection, estimate the number of full-frame equivalents of sealed honey or processed syrup. Two half-filled brood frames count as approximately one full frame. Record the result for each colony.

After any autumn feeding is complete, gently heft the hive from the back and then from each side. This gives you a useful reference for that particular hive when checking it later without opening it. Comparing the same hive over time is more reliable than comparing two hives built from different materials.

During winter, regular external checks and occasional hefting are preferable to opening the brood box. A colony can still starve with food elsewhere in the hive if the cluster cannot reach it, so position and accessibility matter as well as total weight.

How much supplementary feed should you give?

First estimate the stores already present, then feed the shortfall rather than selecting an arbitrary amount. If a colony appears to have 14kg of stores and your target is 20kg, it needs approximately another 6kg of finished stores.

The weight of liquid feed poured into a feeder does not always become the same weight of capped stores. Bees use some energy and must remove water, so continue monitoring the hive rather than assuming every kilogram fed has been stored unchanged.

For autumn feeding, IdealBee Classic ready-to-use syrup provides a convenient liquid carbohydrate feed while colonies can still take and process syrup. Hagens also offers an overwinter feeding kit combining autumn syrup with fondant for later use.

When should you change from syrup to fondant?

Thick syrup is normally used during early autumn while temperatures allow the bees to reach the feeder, reduce its water content and store it. As the weather becomes colder, colonies may stop taking syrup efficiently. Leaving large quantities of unprocessed liquid feed in the hive can increase moisture.

Fondant is more appropriate for winter feeding or an emergency in cold weather. It should be placed where the cluster can reach it, usually above the crown-board feed hole or directly over the top bars when necessary. AnimalUP Bees Fondant is available in 1kg and 10kg packs for supplementary winter feeding.

For more detail on timing the change, read our guide to when to stop feeding bees syrup in autumn.

Important feeding precautions

  • Feed according to need; avoid stimulating unnecessary brood rearing late in the season.
  • Feed in the evening and clean up spills promptly to reduce the risk of robbing.
  • Keep feeders covered and make sure bees cannot drown in exposed syrup.
  • Never feed honey from an unknown source, because it may carry organisms associated with serious brood disease.
  • Do not feed syrup to a colony producing honey intended for human consumption.
  • Once cold weather arrives, avoid repeated inspections and use hefting to monitor changes.

A simple autumn stores checklist

  • Estimate the colony’s existing sealed stores.
  • Use about 20kg as a general target, adjusting for colony strength and local conditions.
  • Calculate the shortfall rather than feeding every colony the same amount.
  • Use autumn syrup while bees can process it.
  • Establish a final hefting weight after feeding.
  • Keep fondant available for winter shortages or emergency feeding.
  • Continue monitoring stores through winter and early spring.

Good winter preparation is not simply about feeding as much as possible. It means leaving sufficient honey, accurately assessing each colony and providing the right supplementary feed at the right time.

Further guidance: National Bee Unit—Preparing honey bee colonies for winter and National Bee Unit—Feeding bees: sugar.