hm, interesting question.

I have to say it wouldnt work, at least not for more than a few weeks. Hormones and signaling molecules are produced in a plant during flowering, and they are mobile....so even if you had the division of branches right down at the collar of the plant, eventually the other side would get the 'signal' that it's supposed to be flowering, and would start flowering (theoretically).

are you going to do this? i'm quite curious to see the result of this...please keep us posted!