Stonewall Kitchen Wild Maine Blueberry Jam. Company classic. A classic fruit spread. Creators of specialty foods. A best seller since our days at the farmers' market. Full of intensely sweet, small, maine wild blueberries delicately harvested by hand and cultivated in the rolling barrens of Northern Maine. Jonathan King, Jim Stoll. 800.207.JAMS. stonewallkitchen.com.