Cranberries are harvested in the fall - generally from mid-September through mid-November. Most cranberries are harvested when growers flood the fields and a small percentage are dry harvested using mechanical pickers.
Cranberries are grown throughout the northern part of the United States - Wisconsin, Massachusetts, Oregon, New Jersey and Washington primarily. These areas offer the special conditions that cranberries require including sandy soil, abundant fresh water and a growing season from May to October.
There are more than 100 varieties of cranberries that grow in North America. Today the DNA of new varieties is patented.