did you say somewhere you were using miracle grow soil or moisture control or something??i had 2 plants in mg soil once,they were both fine for first 2 weeks then i gave one nutes,straight away it got majorly nute burned,the other one did nicely though,i never gave that plant any nutes at all until after 1st week flowering,and then started a dilute flower nute mix and worked it up

anyway i guess what i'm saying is,if i were you,i wouldn't give the plants in mg soil any nutes until after you start flower or chances are they will burn