Can I save seed from my tomatoes and start my own plants next year?

If you are growing heirloom tomatoes or other varieties that aren't hybrids, you can save the seeds from ripe tomatoes and grow identical plants next year from them. Remember that seeds saved from hybrids may not produce plants that are the same as the parent plant. The first hard frost of fall will kill your Tomato plants, so collect seed for next year before then.