thanks man this was my first OD grow last year..
i used the exact same miracle grow formula also lol
to tell u the truth these girls were just heavy fucken eaters, i was feedin em worm castings every week in their soil also.
it kinda depends on how much ur plants can take i guess.
start with a low dose of super bloom, wait a few days see how they look, if they look happy and vigorous you could keep the same strength or add a lil more its up to you.