They use it to keep warm and alive over winter. Or a cold or dry patch. A weekend of torrential rain can put a dent in the honey stores. Beekeepers typically

They use it to keep warm and alive over winter. Or a cold or dry patch. A weekend of torrential rain can put a dent in the honey stores. Beekeepers typically replace it with sugar syrup which obviously lacks the nutrients they are evolved for. So you can buy sugar with additives.