And Smucker's Simply Fruit was just OK. Among the lower-rated products was the priciest one in the bunch. The label on Stonewall Kitchen, $7.05 per jar (31 cents per tablespoon), says ...

Put simply, Smucker’s says it “recommends refrigerating fruit spreads, jams, jellies, and preserves after opening for maximum freshness and flavor.” With both jam and jelly, spoiling is ...