Plant yellowing on the tops Please Help

These plants are 7 weeks into flower. Light of Jah so they should go about 12 weeks. Problem is the tops are yellowing for some reason. Watering every other watering with fox farm big bloom and beastie bloom. Also using three part microbe life. Using ph adjusted water to 6.0. Any ideas would be helpful. I thought it was nute lock out but i have started adjusting the ph and nothing is really changing. I was thinking maybe nitrogen def. I have no clue though lol

how long has it been since you adjusted? takes longer for improvement for the tops.

its probably been a week

I would check the ph and ppm of the run off water to make sure it's at the right level. I can't tell much from those pics.

yeah the color is weird, but i think if it was nute probs you should of seen a difference by now.
another thing is it might just be newer growth turning greener. shot in the dark and i cant tell much from the pics but i had a few strains that did that naturally alot.
obviously keep watching for the problem, but if your growing a strain you havent before it may be just genetics, are they really fast growers?

NPK. Give it that. raise your ph to 6.5 like it should be for soil

ok my run off is at 5.7 now i will get it to 6.5. Yes this is a new strain

regardless looks like you got a good grow there. good luck