I have 5 years old Acer platanoides globosum, nice and healthy. Last two or three years I noticed new stems from the base of the tree, and I regularly cut them - until the last year, when I left them grow spontaneously. Now I have two small globes and one large. They look somewhat funny, but I still find them interesting. I don't see any difference of leaves between large and two smaller crowns. Do you recommend keeping two smaller parts of the tree, or perhaps not?
Bottom left, one can see the leaves of the "suckers".
There is also some two years long injury of unknown origin on the main trunk, at the bottom of the pic, bit it looks it doesn't bother the tree, it healed already. (it looks as if two trunks joined into one, but it is not the case, it is just some kind of injury)
Again, no trace of the graft.
Leaves are large and look healthy.
Contour is fine, I don't expect perfect sphere.