Im just throwing this out there, I figure someone will have to agree or disagree but when my plant leaves got 2 shades of green folliar feeding helped. (ps due to my own toxicicity I am in no mood to be spell checking anything)

My 2nd grow is just getting going so hopefully youll just read my advice and let someone who knows more about this tell you if it would help the color of the leaves because it wont help the brown edges just the color.