QUESTION: How long does a tomato plant last?
ANSWER: A tomato plant will only last a year in most vegetable gardens. As soon as it gets cold and freezes, the tomato plant will die.
In places where the temperature never falls below 60 degrees or when indeterminate tomatoes are grown indoors, they are short-lived perennials that will last for two years. In their third year, the plant tends to stop producing viable fruit.
In other climates, tomatoes will survive until the frost and cold weather arrives, at which point they will die back. They will not return the next year. Tomatoes are most often grown like this, as annuals that must be replaced the next season.