Cranberries are a seasonal food. They only appear fresh in the stores from now through the holidays. Best bet is to buy extra bags and freeze them, because once they’re gone, they’re gone!
We live within walking distance of a working cranberry bog. They were harvesting yesterday. The bogs were flooded causing the cranberries to float to the top. They were then coaxed into collection areas by workers in waders wielding rake-like devices. Finally, the cranberries were tunneled into waiting trucks through large tubes.
Here on the cape, bright red cranberries floating on a bog are as much a sign of the season as beach plums and bittersweet.