Alrite lad, Just a quick 1 ,I thought you had an autoflowerer in there, if you 12/12 it, you will lose half your yield on it, You need to give em at least 20 hours a day, some people even grow them 24/0 to maximise the yield, More light per day = More bud, in the case of autos. I know you have a photoperiod plant in there aswell so it's tricky what to do, I would leave the normal plant to veg a little longer if i was you, Worst case scenareo it will get tall but should rootbound stopping it from getting any taller. I don't know if this will do any damage other than stunting growth which isn't a bad thing if space is a worry.Then you can flower but don't know how big it will get after another 4-5 week veg, if some1 else has experience on rootbounding a plant to keep them smaller and the effects please input. Nice1