Ok, so I couldn't be ersed moving all my plants to get both of them out so the one closest to the exit is the topic here.
As you can see, not quite as yellow when you don't have HPS light shining on it.
As shown it is mainly the leaves on the lowest part of the plants that are going. None of the leaves around the buds or higher up are showing any sign. When I think back this probably started happening when I removed the MH 400 and replaced with the HPS 400......
Man this is actually the stinkiest plant in the grow room at the moment. It smells amazing!! Really can't wait to compare it to the Casey Jones I am smoking at the moment.
So calculation my npk ratio calculation is
5 - 4.6 - 6.8
Based on the 5-1 ratio of Grond to PK.
Reading around (also on other sites) some people are cutting N completely in Flower, and are getting excellent results.
I have no fear of this plant producing some amazing bud based on its state and smell....so IMO, loosing some leaves to yellowing (even between week 5-6) is not the end of the world. I am almost tempted now not to change the nutes on it and stick to adding pk13/14 (just based on the smell I had this morning (and those buds do look fine, Calyx's swelling up nicely on closer inspection......perhaps I could change this for one and not the other CJ to satisfy opinions?
OR/ may be I am just kidding myself, hahaha. The proof is in the smokin I guess.