Powers Heirloom tomatoes take 80 days to mature. These are an all Heirloom and Non-GMO, oval shaped yellow tomato. Will produce heavy in all zones. These are an indeterminate, which means you will have tomatoes all the way until frost. These are a midsize tomato and are more than likely the best midsized yellow Heirloom tomato out there. You only get seeds like this when you buy tomato seeds online! Happy growing!!!