Shit has nutes already, stop adding more! Try this...
If potting mix (its thick, and heavy as fuck and stays wet too long, add a fuck-load of perilite to it, to get the thing to drain right.) Feeds up to 3 months, So when you re-pot for flower in a bigger pot, dont do a fucking thing other than PH the water, go low, like lower 6's.
Moisture control (the kind that prevents under/over watering, has been great for me, try to mimic its draining effect, get some.) Feeds up to 6 months, So you dont need to touch this at all with any nutes, what so ever... Start - finish, If your rocking plants longer than 6 months in the same soil, Wait till the plant starts to starve before adding nutes, and if this is so, its either a mother plant, or a gargantuan fucker, which can take a licken and keep ticken.
Also, people who say no to miracle grow, take it like this, I have a very experienced soil grower I have as a co worker at my job, who was legit cali, etc etc. The words "hard to top miracle grow" came out of his mouth, when I talked about my trials with other more "premium soils" such as foxfarm, blah blah blah. Hell I had clones of the same shit, one in FFLW, then FFOF... The other was in MG, moisture control the whole run... Guess which one was twice as big?
The don't go MG argument is just like the "just say no to drugs"... Obviously you are already against the grain, lol.