Unopened canned tomatoes are best when used within 12 to 18 months when stored at room temperature. While they are safe for consumption beyond this time period, the tomatoes can develop an undesirable metallic taste. Once opened, canned tomatoes are good for seven days if kept in a refrigerator.
Canned tomatoes are picked and processed at peak ripeness to ensure they stay flavorful even after months of storage. During the canning process, heat sterilization is used to sterilize the tomatoes and ensure their safety. This process cooks the tomatoes in their can, which renders them ready for direct addition in recipes.Learn More
It is possible for canned soup to go "bad" if it is not stored properly. Canned items are best stored in a cool, dry place out of direct sunlight and should be used prior to the expiration date.Full Answer >
Similar to other canned products, such as vegetables, canned soup lasts for up to 2 years if it is unopened. Often, canned products list a best-by date, which is not the same as an expiration date. Canned products like soup are still edible after the best-by date passes; however, there may be a noticeable loss of flavor.Full Answer >
A common cause of tomatoes rotting before they ripen is blossom end rot. This is caused by calcium deficiency in the plant, but watering, either from nature or from the gardener, is most commonly to blame rather than the lack of calcium in the soil.Full Answer >
Both fresh and canned tomatoes do contain citric acid. Similarly, any product that is tomato-based also contains citric acid. If a person is allergic to citric acid, he or she should read the food labels on products to ensure it does not contain this substance.Full Answer >