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Storing in the Refrigerator. Scoop sauerkraut into jars or freezer bags. Close the jar or bag tightly so no air can enter. Label the jar or bag with the date. Sauerkraut can stay good for up to three months in the refrigerator. Dating the bag will help you remember its age. Place the jar or freezer bag filled with sauerkraut on a shelf in your refrigerator.
For best quality sauerkraut, a room temperature of 75 F. (23C) is ideal; fermentation will take about 3 weeks. At 70F (20C), allow about 4 weeks; at 65F (18C), about 5 weeks; and 60F (15C), about 6 weeks.Temperatures above 75F will result in premature fermentation and possible spoilage. Keep track of the temperature so that you know when to check the sauerkraut.t 70F (20C), allow about 4 weeks; at 65F (18C), about 5 weeks; and 60F (15C), about 6 weeks. Temperatures above 75F will result in premature fermentation and possible spoilage. Keep track of the temperature so that you know when to check the sauerkraut.