Like the other responders, I get a lot of suckering from my M111 below the Bud9 interstems. I actually have some that are M111/M27 as well, but those sucker pretty much the same amount. I wanted very small free standing trees, that grew well in clay and had some drought resistance. I wouldn’t have gotten that with just a dwarf root stock. But I will say I have probably runted some of them more than I intended with aggressive pruning from myself and my local deer, so be careful with that. Without the deer they’d probably be fine.
To do it again, I would probably go with a single rootstock like a G969 that has a bit of dwarfing but is still free standing and just kept them small with summer pruning. I have a few I’ve put in since then on that rootstock and I find it easier to manage excess vigor with the G969 than coax plants along that are growing slower than I’d like.
I’m actually thinking of doing a bridge graft from the M111 suckers to the scions on a few of my original interstems to give them a push of vigor. I may cut that away after getting more size on the trees, but I may just leave it in place if they don’t get excessively vigorous. If nothing else it will be an interesting experiment.
