From Ohio here, where the winters can get to minus numbers, like minus 10 degrees. With that said, keep that in mind for the rest of this tale. Had chickens growing up, and dad would clean out the chicken manure keeping it on a pile . During the summer dad had a huge veggie garden. Some of the veggies were tomatoes, now if a nightly roaming animal decided to chew on one of the tomatoes, he'd take that tomato and splat it on to the chicken manure pile. So went the months, so when winter. Come the next spring you would see little baby tomato plants coming out of that pile. He would take those and plant them in his rows. And so the cycle continued.