Q: Is it possible to can yellow tomatoes like I do red ones?— Julie Crossen, Powell, OhioA: Any tomatoes can be canned; however, due to varying levels of acid in tomatoes it is always necessary to add acid when canning any type of tomatoes. This will keep the preserved tomatoes safe for eating by creating an environment where bacteria cannot thrive, regardless of the canning method -- boiling water or pressure.Acidifying tomatoes can be accomplished by adding commercially bottled [...]
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