I don't get why you say to double up on grow during the final phase of flowering? Grow has too much nitrogen to be doubling up on at the end, you should be cutting it out completely a couple weeks before harvest.. I grow indoors with EJ and i don't hjave problems with my plants fading too early, you just need to dial it in properly.. Try searching Earth Juice by the 3lb 'three little birds' . They have a big page full of earth juice information which is what i used to dial in my grow.. After reading this chart and applying and slightly tweaking the schedules they have listed i was able to dial in my feedings perfectly so my plants were staying 100 % green and had zero spots or messed up leaves.. I find my problem a few times has been my plants started to fade slightly early, so i panic a bit and add a bit more grow to try to green them back up, and i end up giving them too much nitrogen towards the end and i think it has messed up my potentcy a couple times.. If you are giving too much nitrogen towards the end of flower then the plant might start focusing on growing some greenery and stop putting all of it's energy into producing resin.. I know this has messed with my potentcy before.. Actually i even did it again a bit this time, and i told myself i wasn't going to and still did it.. My plants outside this time were beginning to fade maybe 2-3 weeks before harvest, i thought it seemed a tad too soon so i added some nitrogen, only being organics things take a little more time to show up.. So it took the plants a couple weeks to begin to go green again, but at that time i was near harvest, not a good thing.. Atleast my plants were near finished anyways before that nitroge began taking effect, so i don't think i scrweed up my potentcy too badly.. Something to be cautious of though...