I once planted some past-their-best parsnips in the garden from the fridge. I figured they'd either grow or compost. They grew. They flowered.
Ants pollinated them. The plants were covered in columns of ants trooping up to the flowers and back down.
Eventually they produced seeds. So many seeds they tried to overrun the whole garden.
@Heliograph @KaraLG84 @Pineywoozle
I am attempting this even as we speak. No sign of success yet.