I just put my plants into flowering like four days ago so im hoping this wouldnt be as much of a problem, but using my Earth Juiice Grow wouldnt be BAD for the plant, I mean better then nothing right? Because I know your P and K levels should be higher then N for flowering nutrients. I plan on getting some Earth Juice bloom variant nutes, just might not have money/time to make it to the hydro store for a couple weeks.
It would certainly be better than nothing, but your harvest will suffer because of it. I believe too much N and not enough P during flowering helps cause fluffy rather than dense buds. You'll also probably start seeing a P deficiency at some point, exhibited by purple stems.