Remark: Smexy, and handy. Better than A+, and necessary to anyone that grows trees. Suggestion: Maybe make the numbers larger, as when zoomed out they are impossible to read. Not too much of an issue though. Other Stuff: None.
Dwarf tree's not really something that I think looks nice. But I might have some other idea on that.
Just some screenshot of something else I have in mind. (Which would probably work better as client a feature, but that's not on my menu.) - First box: Tree hitbox. (if any) - Middle box: Current tree hitbox*3. (if any) - Last box: Next tree level (if any) hitbox*3. (that should be the tree stunt zone.)