Fondant vs Syrup for Winter Stores
Two Feeds, Two Different Jobs
Syrup and fondant aren't interchangeable — they suit different points in the autumn feeding calendar, and using the wrong one at the wrong time either wastes your effort or, worse, stresses the colony at a point it can't afford it.
Syrup: For Building Stores
Heavy syrup (2:1 sugar to water) is for building winter stores while the colony can still process it efficiently. Bees need to evaporate the water content down before it's capped as usable stores, and that process relies on warmth and colony activity — both of which drop off fast as temperatures fall. This gives syrup a real cut-off point: once night temperatures are consistently dropping toward single figures, generally through September into early October in most of the UK, the colony can no longer process syrup properly, and continuing to feed it risks damp, unripened stores in the hive rather than usable ones.
Feeding syrup outdoors always carries some robbing risk, since the smell draws in other bees and wasps looking for an easy meal. Pairing syrup feeding with a reduced entrance — straightforward with a Hive-Five Multi-Guard — keeps that risk down while stores are building.
Fondant: For Topping Up Later
Fondant is a solid, ready-to-use sugar paste that bees can access directly without needing to process or evaporate anything. That makes it the right choice once the weather has turned — from mid-autumn through winter, as an emergency top-up if a colony's already-capped stores are running light, rather than as the primary way of building stores from scratch.
Getting the Sequence Right
Early autumn (through September): heavy syrup, while the colony can still evaporate and cap it properly.
Once temperatures drop consistently: switch to fondant. Don't keep feeding syrup into the cold just because you started that way — you're doing the colony no favours once it can't process it.
Through winter: fondant only, placed directly over the cluster, checked periodically on mild days without fully opening the hive.
How Much Is Enough
A full-strength colony typically needs somewhere around 18–20kg of stores to see it through a UK winter. Hefting the hive — lifting one side slightly to judge weight by feel — is a quick, low-disturbance way to check reserves without a full inspection. If it feels noticeably light for the time of year, that's your signal to add fondant rather than wait and find out too late.
The Bottom Line
Syrup while the colony can still process it, fondant once it can't — that's the whole rule. Get the switch-over timing right and your colonies go into winter with stores that are actually usable, not just present.