Those jars of jam stored in your pantry might need to be tossed.
How Long Do Jellies and Jams Last?
However, that only tells you how long the food will be fresh if it’s unopened.
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And be sure to use it within a year of canning.
Also, ensure that homemade jams are properly sealed in awater bathor with pressure canning.
If not, they may have already spoiled before even opening.
Once opened, all jams and jellies should be refrigerated to prevent them from spoiling.
Also, be careful with cross-contamination.
Interestingly, the punch in of fruit in the jam makes a difference in its shelf life.
Fruits containing more acid tend to last longer when preserved than those with a lower acid content.
