Yellow leaves

hey there, sorry to say but i have to disagree with the zinc deficiency, really you're already adding zinc in one of the fox farm nutrients so it cant be that at all. However you're not adding any cal mag, as you can see there's yellowing on the serrated edges of the leaf which is a tell tale sign of magnesium deficiency. Just add cal mag and the plant should recover within ten days. Hope this helps ! 🚀

Your plant is suffering from a zinc deficiency my friend.most of the time the plant has plenty of zinc since it is found abundantly in most tap water. If you’re using quality soil or cannabis-friendly nutrients, you probably don’t need to worry about adding more zinc. In general, zinc deficiencies are more likely to appear when a grower is using heavily filtered or reverse osmosis (RO) water to feed plants since any zinc has been removed, but pH is a much more common reason growers see zinc deficiencies in their cannabis plants. Try bringing your ph down to around 6.2 and see if she intakes better or you may need to calibrate your ph device also to make sure it's accurate. Hopefully, I answered your question and remember Happy Growing and Free your mind one puff at a time.

Hey! By the color change and given that it’s mostly on top it looks like a Zinc deficiency. Although it could be magnesium, also looks very similar. Nutrientes and PH look alright if your in flower.. I would even take it down to 6.2ph. Hope this helped, any questions let me know. Good luck and happy Growing.