Properly stored, an unopened can of tomato paste will generally stay at best quality for about 18 to 24 months, although it will usually remain safe to use after that. … Discard all tomato paste from cans or packages that are leaking, rusting, bulging or severely dented. Can tomato plants be pruned back? tomato pruning diagram.

How do you know if tomato paste has gone bad?

How can you tell if opened canned tomato paste is bad or spoiled? The best way is to smell and look at the tomato paste: if the tomato paste develops an off odor, flavor or appearance, or if mold appears, it should be discarded. Discard all tomato paste from cans that are leaking, rusting, bulging or severely dented.

Is it OK to use expired tomato sauce?

Can You Eat Tomato Sauce After the Expiration Date? If tomato sauce is in the fridge it should be alright for another three months or so past the expiration date, as long as it is a commercial sauce and not homemade. If it has not changed color, it should be fine for a bit longer left in the fridge.