G2 420Carat F2 MC2

@Ctrellis yeah, I'm feeding it but not a lot. I posted a breakdown in grams here. https://ibb.co/nDN35Sw I'm using a blue lab PH pen. It shouldn't be the nutrients.. Because the other plants that are using Advanced Nutrients have the same problems! It's driving me mad.

@gottagrowsometime, if you read this, I have done foliar spray of epsom salts a few times on this plant as I thought it was mag def at first, but it seemed to make it worse and caused a mag toxicity.. or was that dark shade of leaf its normal color? it seemed sick to me. it was around week end of week 11 to 12 to to beginning of 13.

The easiest way to fix major deficiencies like this ons it by flushing the soil once with 2 times the pot volume in water with the right pH and a small amount of nutrients. After you have done this let the soil dry out for 2-3 days and than you can continue watering like you did before but with less nutrients, the right NPK ratio for every phase of the grow and the right pH. And occasionally water till runoff to get rid of the build up salts inside the soil to prevent issues like nutrient lockout.