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Feeding Dry Pollen during the Winter
Feeding dry pollen substitute can be beneficial during the winter months, however, it is not as critical as feeding pollen patties.
To feed dry pollen powder, you must place the powder outdoors, ideally at least 20 feet from your hive. You can purchase dry pollen feeders or make one.
Essentially, you need a container that will keep the powder dry if it rains, keeps livestock out, and to which the bees have easy access. A simple and cheap option is a 5 gallon bucket lying on its side with half of the lid cut off. My personal favorite dry pollen feeder is a Pro Nuc box, with the plastic entrance slide removed completely.
I add about 5 lbs of powder, and put either container in a tree to keep varmints and livestock out of it. The bees will forage during warm winter days that are sunny, calm, and above about 45 degrees. They bring the powder back to the hive to use much like natural pollen. Keep in mind, bees will only forage on dry pollen powder if there is no natural pollen flow. The advantage of open feeding is it more naturally simulates a natural pollen flow, and may encourage some additional brood rearing. The disadvantage is you are feeding all the neighborhood bees in addition to yours.