Comment to 'what could this be?'
  • PH could be your prob but I don't think so . It's one thing to diagnosis a deficiency, but you also want to know WHY !!! Sometimes K and Mg become unbalanced, especially during flowering, when P and K applications are heavier than Mg. Here's a great article on the subject. https://www.kpluss.com/en-us/our-business-products/agriculture/kali-academy/facts-worth-knowing/Interactions-of-potassium-and-magnesium/   

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    • I should have read this first, Great link btw

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      • It looks like some of those leaves are clawing a little, that's usually too much N isnt it? 

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        • Good article

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