Nature wins, at least at our house.
This year we purchased and planted six tomato plants. They all died. But...this hardy fellow came up on its own in the middle of our yard, growing from underneath the pile of fence panels we have yet to put up. It's about four feet by five feet and has been loaded with cherry tomatoes all summer. I can't explain.
I have purple coneflower planted in my front flower bed and they do fairly well in spite of not quite enough sun. However, this little jewel came up through a crack between our porch and the house. Amazing.