There are two possible methods of harvesting cranberries: dry harvesting and wet harvesting. Wet harvesting is how most cranberries are gathered. Those berries are destined to become juices, jellies, and dried fruit. Because cranberries contain pockets of air, they readily float to the surface, which makes harvesting a simple process. The other method, dry harvesting, involves collecting the cranberries before flooding the bog. The fresh cranberries you buy at the store were likely all harvested dry.