About two to three months. The homemade strawberry jam has no preservative, so the production process is not strict and the shelf life will be shorter. It can be kept in the refrigerator for about 2 to 3 months. The shelf life of homemade strawberry jam is usually shorter than that bought outside, which is mainly because the homemade strawberry jam does not add preservatives and other additives, and the production process is not strict. The strawberry jam bought outside not only has preservatives, but also has strict sterilization process requirements, so the shelf life is longer.