Years ago I transplanted a peach tree that came up in the compost pile (yellow freestone), and also a Cherokee white given to me by a friend. The Cherokee had small, not so good tasting peaches, but edible pits. The yellow freestone in 3 years was producing a lot. They cross pollinated and soon the squirrels had their own peach plantation coming up everywhere. If they were in a good spot, I let them grow. Huge trees, all a little different, but all had delicious fruit. However, this is borderline for growing peaches and late spring frosts and too much rain as they are ripening make it a little challenging, Prune out centers, make sure they get good ventilation, plenty of calcium/phosphorous and a little wood ash around the drip line and out, as well as compost. Whitewash the trunk with lime/manure/wood ash and it will give favorable results with few to no bugs. One large tree in the apple orchard set so much fruit three large branches split and tore off the tree. We still had nearly 5 bushels from this seedling tree, and they were scrumptious. Had to prune back to a few feet high on the main trunk due to the damage. It grows crowded by apple trees so not enough ventilation but we had a very dry year, so they made it mostly to maturity without rotting. Bug free with no sprays. Unfortunately due to the damage to the tree, it will take a bit to recover but we have more trees, just not as productive as that one.