Yes, you can, more or less. But the devil is in the details.

Some rootstocks are compatible with more species than others; some attempts appear to succeed and then fail; some species grafted to a given rootstock will hesitate while others surge and the imbalance can be difficult to manage.

I have a little Italian prune plum that we love and grafted a piece of it to Nanking cherry (prunus tomentosa) rootstock just to see what would happen. So far, so good, but definitely dwarfing. It is a few years old and has yet to blossom. But, who knows? You won't know until you try.

Good luck,

M

So simply try try try and try again? I like that answer lol More reason to plant more things! Thanks youve been a great help

Well, all just FWIW- there are much more experienced posters than I here, and when they speak you should listen to them over me.

But yeah, try, try, try again. We can all agree on that!

:-)M

Mark is correct. You can try try again, but there are some serious obstacles to overcome.

First it's a mistake to consider that all prunus are compatible. It would be like saying anybody can accept blood from another because we're all humans.

As an example, apricot has been shown to have delayed incompatibility with plum.

I'm not aware of any nurseries putting cherry on peach. It may not be because of incompatibility, but it probably is because nurseries have no problem putting Japanese plums and apricots on peach.

I can't remember for sure, but I'm thinking European plum is incompatible with peach roots.

You may be able to do what you desire, but it will probably involve interstems, and even then it may not work.

It would be an interesting tree were you successful.

Olpa

Thanks for the response.

I was finding that out too (that all prunus arent compatible). And as well, that plum on apricot rootstock (some european plum species apperantly) has shown that delayed dealth you speak off. The same would go for the opposite id assume (apricot on plum roostock?)

Im limited to certain rootstocks here. Peach rootstock wont survive here. So im limited to plum (which is for sure hardy), and apricot (presumably hardy). I can also use hardy pin cherry, sand cherry and others if i fail to graft to the plum, and I can espalier that to control it.

Im assuming "interstems" refers to grafting, of a grafted branch?

Thanks again for the info!

Yes, interstems are a scion grafted on a rootstock, then something else is grafted on the interstem. Interstems are used for various reasons, but in your case it might assist compatibility. An example that comes to mind is some have used winter banana apple as an interstem to graft pears to an apple rootstock (Winter banana is fairly unique in that it is compatible with both apples and some pears.)

I was under the assumption you were going to try this experiment in potted culture. If this is an outside espalier, your peaches and nectarines will likely freeze out and die. Additionally almonds don't tolerate severe winters either. Hall's Hardy almond might be OK in your zone, but some have complained of the nut quality of that cultivar.

Given the constraints of your zone along with the various incompatibilities mentioned, you might try just espaliering a few trees of apricots, cherries, plums.

Maybe you could save space by just keeping the trees close together and pruning accordingly. Many people on this forum do that. If interested, look up Scott Smith's page on this forum. He plants his trees something like 4 foot apart and prunes them as a hedge.

Im going to have to look up the winter banana. Thanks for that lead.

And as for the peaches not surviving here.... Well im not saying ive ever seen one here, but my area is a bit odd when it comes to hardiness zones. The lake moderates the temps about 10km inland form the lake. My city has bands of hardiness zones, which vary from a cold zone 5 - zone 2. Basicaly its a guessing game as far as your specific place, untill you plant something which indicates this (Ive had wiegelia, that is rated zone 5 survive here, as well as hibiscus moeschetos) with no protection other then snow.

To be short, I wont know till I try here. Theres flora here that isnt anywhere else around here. Its located a few hours south of me, near minniapolis.

But your information is valid either way, because if they dont survive, im going to be forced to grow them in pots. I appreciate it BTW. Im not afraid to try a few things. Thats the best prt of gardening IMO.

As for pruning. Im going to have to learn to like it. Ive got alot of trees cramed into my small yard lol. I could also pleach them.