I don't think I've ever seen a plum tree just out in nowhere in my life.
Did you find these at some old farm house site where someone planted a plum tree 100 years ago?
There were some old apple trees in a small clearing in the middle of woods in Hocking county that we used to get some apples from back in the late 60's. There was a house or cabin of some kind there at some time in the past but couldn't tell what kind of structure, it was all gone but just a couple of rotted timbers
That's cool, I know of a few persimmon tree locations on the farm.
It looks good. Can you drink it like a thick coolaid?