Nute burn or nute deficient??? (PICS)

I am using fox farm ocean forest soil and whenever I start flowering the leaves will start looking like this WITHOUT adding any nutes. I'm thinking either the soil is too high in potassium or it's not getting enough. I can't tell if its deficient or burnt.... I really don't think its mites or pH, or temperature so i figure it must be a nutrient problem. I am 2 weeks away from harvest so I don't plan on fixing the problem now...but I was just thinking ahead for the next grow. Other things I was considering were possibly phosphorous or magnesium deficiency. Thanks for the help!

I have thee exact same problem with FFof soil. Only in flower as well. I'm in the process of tryin to figure of how to fix it ...

I am too. Figuring it was nute burn I skipped a couple fert rotations and tried to be more careful ph-ing. Today I tried upping P (9-50-10: Cha Ching mixed with 2-8-4: Tiger Bloom plus Grow Big as per FF's schedule at 40% their recommended dose. I'm just starting the 7th week flowering and the tricombs are all cloudy on the Jock Horror and all clear on the Northern Lights (Peakseeds). I'm not too worried, but my yield will likely be less than I had expected earlier.