Yellowing at 4th Week of Flower

Some like miracle grow are specifically designed to mess with MJ! Their NPK is not where they're doing it. It's all the other ingredients that do it. That's from an educated older person I've meet who has dealt with the reps from miracle grow. That's not me trashing them.

Stutterfly said:

Just seems weird that only 3.5 weeks into flower there's no way to get green color back but alright.

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In most cases irregardless to stage a yellow leaf won't turn green again. Usually the best you can do is for new growth to be healthy and green. The older leaves if corrected properly shouldn't get worse. But especially once flowering in initiated it won't. Normal life cycle tells these plants to concentrate on flowers and seeds. In nature at this point it's about survival of the species. So it needs flowers to make seeds then it dies. So it won't waste energy on older growth.

I dont think your gonna hurt it by giving it some N in your waterings its already defecient so no harms gonna happen, i would use the fish emulsion, another thing you could do is put a couple teaspoons of bat guano top dressing on if your in soil and thats a high N organic fertilizer but yes the yellowing wont go away the damage there is done but you can stop it from continuing and i think roots will still take some of it up especially if your deficient in it. but yes always give veg nutes 2 weeks into flower then switch to bloom nutes.