In my area largetooth aspen can grow 8" in 13 years on a good site, well drained, from root suckering. They are native here and not as plentiful as trembling aspen. They should grow out your way, since they range in southern Ontario along the border. My tree book shows native Canadian trees and doesn't draw the range into the US. My dendro book mentions largetooth, but no map at all. It does describe the range being much the same as trembling in the mid-west though. Maybe the USDA site has a proper map if your interested. I had some nice ones coming along in one corner of my lot, up on a high bank, until the cursed beavers found them. They cut 8-9" trees and left them lodged all over the place.
