Peter Hanlon, a 68-year-old farmer from Boston, has been growing cranberries in Cape Cod, Massachusetts, for decades. Cranberries are in Hanlon’s blood — his grandfather farmed them on the cape before him. But six weeks ago, Hanlon sold his farm in the town of Sandwich. None of his kids wanted to carry on the tradition, and Hanlon doesn’t blame them: Profit margins are incredibly tight, and increasingly erratic weather patterns in recent years have made cranberries more difficult to grow.