Read something before you try to grow weed. Everyone and their mother is an expert at growing weed until they try it. I am not trying to be an asshole or anything, but it would greatly help you. If you can't figure it out, then come back with a picture, and someone here most certainly will be able to help you. I speak for a lot of people when I say try and read something first though. The majority of us are self-taught, or at least were self-directed.
The best of luck.
P.s., I sincerely doubt topping it would be in the least bit beneficial for you, no matter what the case, (well, not for the purpose you are thinking).
