OK, thanks, looks like I can’t graft peach to plum, but I could maybe put a plum on a peach. Alright that settles that issue, then.
In a few years after all our new trees get settled, we’ll have four different peach varieties, which should be enough. Plus, if our new plums do well, we’ll have a different fruit to try. We’re not big plum fans, but at least we could try them and graft a different variety if we don’t like these.
Edit: I looked thru another thread (and posting on it) about grafting peaches onto Prunus americana, or wild plum, which is what I have, not an euro plum. So, I think my original idea will work. But, I will wait until next year to try it. Got to make sure these two plums will survive the transplant.