My plants are 4 weeks into vegging and the bottom leaves have started to discolor and become droopy while the top ones are just fine(except maybe they feel a little rough on touching). I was thinking it could be a N deficiency but they're on a Grow-Micro-Bloom diet from AN. Also, only the bigger ones seem to be affected by this, the smaller plants seem to be just fine although i treat all my bitches the same way. Is it possible I'm not feeding them enough? This is my first grow and I'd appreciate any help