We use these in late winter. Add them to the Sugar Boards for an extra boost. The bees love them. Winter Patties will provide your colonies with food stores when the bees find the cupboards bare. Winter Patties provide carbohydrates and only a very small amount of protein, so your Queens won't be encouraged to start rearing brood too early. As warmer weather approaches switch to a pollen substitute patty like our Spring Patties which will provide both carbohydrates and protein for brood rearing.