Every time that we've tried our hand at gardening, it's resulted in utter embarrassing failure. Nothing we try to grow actually manages to get past the budding stage, before we forget to water it, it's attacked by bugs and birds, or it simply commits suicide because it can't bear the thought of being in our yard. But you know what does grow? Weeds.
Hell, if there was a market in selling weeds (not that kind), then we'd be filthy rich. We can grow whole lawns full of weeds with any effort, and they come up in the strangest places. Having said that, we've never seen them growing out of the back seat of a car before. That one's new. Clearly someone else is a better weed gardener than us.