Honestly mate I wouldn't put any type of miracle grow product near my ladies.
I have always used biobizz lightmix for my substrate and fed biobizz root juice, grow, bloom and topmax and had amazing results. I always fk about with my feed schedule etc and think I have found the one that suits my grow type.
I pulled 8.5 oz total dry weight off my 2 afghan kush auto and was well impressed.
I would ditch the miracle grow next time and do research on different brands of substrate and nutrients and see what you think.
I'm actually just after commenting on your green crack diary lol