Specs: 600whps/240w led All organic amended soil Temp 60-74f Humidity 40-50% Only appears on the lower growth, all my established plants are starting to do it.
I checked ph, results are water going in at 6.4 straight water, and run off at 6.0. Looks to me like it should be ball park right?
Looks like a Nitrogen deficiency to me. The Plant is taking the Nitrogen from the lower Leaves to give to the top. Do you have an Cal-Mag?
Its the start of nute burn. Your leafs are way too green. Ease off the nuts for couple weeks, then start off lightly again. Some strains love food, others only like a little. Really, when growing different strains you should revise abit , see what other ppl are doing. Could also be Ph related, try Ph water going in @6.9 , your aiming for run off 6.2 ,