I have a lemon tree that I is probably 8 or so years old. It has not produced flowers and as such lemons in many years. The tree spends the summers outside and then is returned to my greenhouse in October/November. I do fertilize it and make sure not to overwater it. I have removed suckers over the past year, hoping that was the issue. In addition, the tree has what appears to be two trunks. Should I remove one of the trunks and trim the other one back more so that more energy is put to use developing flowers? I have not looked at the roots to see if the tree is root bound. Any other suggestions?