Answer: Annuals are plants whose life cycle (vegetative growth, bloom, seed set) is completed in a single growing season. The plant dies at the end of the cycle and a new generation begins seed germination. Most vegetables are annuals (asparagus is a perennial). Even though you may be able to get your tomato plants to live longer, they'll lose their vigor. You'll have healthier crops and better harvest if you treat them as annuals. (Crop rotation to prevent disease build-up in the soil is another important consideration.) Good luck!
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