too many variables bud, i dont know how big your pots are, no experience with the strain( they might be only mid range plants? not all plants grow 6f plus and there cuttings from which i have no experience, iv heard peeps say that they yield just as much as mother ect but i struggle to see this, maybe next time grow from seed yourself as u can start training a week n half in, research high yielding strains, ladyburne1974 is my suggestion, attitude seedbank. maybe get some diff nutes in, senci seed advanced nutes it a two part fert, tried and tested and pluggin. u have between 55-70 avereage, (all bout the trichs) for most idicas, sativas longer again u carry at your rate thats another foot plus of growth and u only have 4 foot height, during the flower period the can double in size, u just wanna keep the space between nodes to a miniumal, if ur fans are man enough flip to a 600w hps.. this is what i forgot in the 1st post lol prob most important...more light more bud