Twenty years ago a friend gave me some suckers from some East Coast Maples. She had visited her family in Quebec where her father had a maple syrup farm. I put them in the ground, and two have survived and are beginning to look like trees. Two years ago, I began to remove the tiny little branch shoots up the sides of the tree, to try and develop a trunk and fuller branches. It seems to be working and they seem to be beginning to form a canopy. My question is if I should continue to do this - to remove the little side branches up to the main ones? Or if I should now leave those so that perhaps they may form branches? It is very unusual to have the east coast Canadian Maple surviving here, and it would be lovely if they began to be more tree like. I believe they are slow growing, so may not be adult trees in my lifetime. They are a good twenty feet tall now.