MM111 rootstock and 3 trees in one hole?
Would really appreciate some advice as I try to plan for this spring!
I plan on doing a Dave Wilson-style planting of 3 or 4 apple trees in one hole. As I'm researching rootstock types and availability, it seems that the MM111 is going to be the one I'll need to go for (need something with moderate resistance to fire blight and it's pretty much all I can find that is available after eliminating the other options, which seem to be very susceptible) Apple varieties will also have resistance but I'd really like to double up and have a rootstock that is not super susceptible either. I also like the idea of not having to have a permanent stake.
I understand that this rootstock is not very dwarfing, but I would like to keep the trees to maybe 7- 8 feet. Will the combination of multiple trees together in one hole and aggressive pruning/summer pruning in the first couple years be enough or should I rethink things and go for a more dwarfing rootstock?
Any advice is greatly welcome from all of you more seasoned growers!
My head is spinning trying to research all of this!