I have some cherry tomato plants from seeds that have been coming back over the last 2 yrs, even with harsh winters that kill other plants. It's new to us.
Nice blessing! Tasty.
How cool is that! Is it a particular variety?
@TXHolly Well, of course I can't find the seed packet. They're not red, though. They are orange cherry tomatoes and sweet. I'll ask my sister and husband. Don't count on it, though. 
@Bleukitty