Knowing when it is needed

By weight. Lift the back of the hive an inch off the stand and learn what a provisioned colony feels like against a light one. It is imprecise in absolute terms and very good at showing change, which is what you actually need: the same hive, a few weeks apart.

You cannot get this by opening the box, because in the weather where it matters, opening the box is itself harmful. Hefting exists precisely because inspection is off the table.

Late winter is the dangerous part

Colonies do not usually starve in the depths of cold. They starve later, as the season turns, because consumption climbs sharply once the queen starts laying again and the colony has brood to keep warm and feed. A hive that felt fine at midwinter can be in trouble a few weeks later.

So the checking gets more frequent as the weather improves, not less. That is the opposite of what instinct suggests, and it is where a lot of colonies are lost within sight of spring.

The three feeds

Dry sugar, the Mountain Camp method

A sheet of newspaper over the top bars, a shim or eke to make headroom, and plain granulated white sugar poured straight on. Moisture from the colony dampens the surface into a crust the bees work at gradually.

The fastest option, needs no preparation, and can be done in under a minute. It also absorbs some moisture, which people either count as a bonus or as evidence that it depends on a damp hive, depending on which side of the ventilation argument they sit.

The name comes from a beekeeper posting under that handle on a beekeeping forum, which is a fair reminder of how much of this craft spreads by practice rather than publication.

Fondant

Ready-made soft sugar paste, either bought as bee fondant or as plain baker's fondant. Laid flat over the top bars, usually with the packaging slit open and set face down.

The tidiest and least messy option, and the one requiring least judgement, since it is already at the right consistency. It costs more than a bag of sugar.

Candy boards

A shallow rim that sits on the hive body, filled with sugar mixed with a little water and set hard, often with a small amount of vinegar included as a mould inhibitor. Made in advance and put on as a unit.

More work up front and the most convenient in the moment, since fitting one is a single motion in the cold. Some designs incorporate an upper entrance or a ventilation gap, which is worth thinking about rather than inheriting by accident.

Placement beats recipe

The single most common way emergency feeding fails is putting it somewhere the cluster cannot get to. In cold weather a cluster moves upward readily and sideways very reluctantly. Feed at the far end of a box, or below the cluster, is not feed.

Directly over the top bars, centred over where the bees actually are. If you are unsure where that is, a still cold day and an ear against the side of the box will usually tell you.

Doing it without harming them

  • Pick the mildest day available and work fast. Under a minute is achievable for all three feeds.
  • This is not an inspection. Do not pull frames, do not look for the queen, do not break the cluster apart to see how they are doing.
  • Plain white granulated sugar only. Not raw, brown or unrefined sugars, whose solids bees digest poorly and which are associated with dysentery over winter.
  • Never feed honey of unknown origin. American foulbrood spores survive in honey for decades. Honey from your own healthy colonies is fine.
  • Leave pollen substitute out of it unless you mean it. Protein feed stimulates brood rearing, which increases consumption. That is sometimes exactly what you want in late winter and it is a separate decision from stopping a colony starving.

Where beekeepers disagree

Whether dry sugar is good enough. Some find it slow and wasteful, with a lot ending up on the floor. Others use nothing else. The disagreement often traces back to climate, because how well dry sugar works depends on there being enough moisture in the hive to soften it.

Whether to feed at all. There is a genuine commercial view that a colony needing rescue in January was not going to be a productive colony anyway, and that the time is better spent elsewhere. Most hobbyists reasonably feel differently about a hive they can see from the kitchen window. Both positions are coherent.

The version worth solving

Everything above is damage control. The version of this problem that can actually be solved is the autumn one: hit a stores target that suits your climate, finish feeding while the colony can still cure syrup, and combine anything too weak to hold a cluster rather than hoping.

If you are reading this in a cold month with a light hive, feed it. Then note it down, because next autumn is when that hive gets fixed properly.

Sources and further reading

Which month counts as late winter depends on your hemisphere and your climate. Anchor this to your own season rather than to the names of months.