I most often don’t keep volunteers but have some this year that I decided to leave, right where they are. They are the only potato leaf type I have and I’m not sure where they originally came from.
They came up earlier and are bigger than the other volunteers I’m finding. There were about a dozen of them all in a clump, but a light frost and a lot of little snails thinned it down to just three at the seedling stage. The look really strong and healthy right now.