I know it is typical and customary to graft multiple stone fruit species to one rootstock as there are many which are compatible. This point was driven home by the recent Guinness World Record
I have been thinking about apples and all of their distant relatives that have been discussed on the forum and thinking you might be able to do more with them than stone fruits, species wise.
Starting off with apples and using interstems, you could do aronia, hawthorn, pear, shapova, from there possibly roses as they are related, and likely many more I can’t think of from the top of my head. Plus multiple apples (American natives vs red fleshed etc) are considered different species so you could have 30 or more on the same tree just doing that. Sure many of them taste terrible, but they are technically fruits and technically edible. I think the challenge would be picking enough bearing fruit at the same time to break the new record.
Additionally, apples should live long enough to keep adding vs the potential short lifespan of stone fruits.
I feel like it would be better to start with pear as a base, as there are more things that will graft directly to that:
Rowan (Euro. mountain ash)
Winter Banana apple
That’s 10 without interstems just off the top of my head, and doesn’t count the many varieties of hawthorn separately, or include the pears or Mt Ashes that aren’t really important as fruit. As you suggested for apples, you can really get going once you add interstems.
I actually have been planning to do this with a quince rootstock that I planted recently. I will for sure graft to it: euro pear, asian pear, medlar, apple, crabapple, juneberry. Possibly others. Just doing it for fun and to see how well it will work.
Europe pear, Asian pear, shipova, works on pear base. Does quince grow on pear or other way around? Hawthorn on pear did not survive more than 2 years. Have not try the rest on your list yet. Interested in trying though
I don’t know from personal experience, but I’ve seen quince for sale on pear rootstock and vice versa. As for hawthorn, I know it’s been used successfully for pear, but it’s possible that it won’t work the other way around. And it’s not a top choice, at least for North America. It also may depend on the particular pear and hawthorn.
I have 2 different quince cultivar grafted on pear, they still alive after 2 years, gonna be 3 years coming spring if they are still alive. But they didn’t grow, an inch in two years . Feel they won’t make it anytime soon. If youknow the pear rootstock name please share. I love to find a tree that can grow different fruits that I just want occasional like quince , hawthorn etc
Why would the red apples not be counted as a apple? I read there are some good tasting red apples. Namely rose mountain apple and the redlove series. Never tried them myself but people describe them as a lemonade or fruit punch tasting which I would not say is bad. As for apples there are over 7000 varieties so there is going to be a lot of duds.
Certain cultivars of pear graft well to quince, others don’t. Comice is best known for grafting well on quince. clarkinks made a great post on this topic here: What pears are quince compatible?
I don’t think apple and quince are very compatible from what I can find. I’m assuming using interstems would work to graft apple to quince though, quince rootstock->pear interstem->winter banana interstem->apple of your choosing
Fertility pear might be a good interstem to mate to the Winter Banana. I’ve fruited fertility on an apple tree before the grafted portion eventually died. I’ve also fruited Winter Banana apple on a European pear tree.
It’s unique in that it is an apple variety that’s known to be compatible with pears. As to why that is, I would assume it has to do with genetics. Same reason Comice is compatible with quince whereas Bartlett isn’t, different genetic compatibilities. Beyond that I don’t know but would be interested to learn more.