Leafs changing color

mmmm overfertilization ??

its ph you are putting it wrong and you heavily overfeed your plants, they are in lockout either let them dry out before you start water them with just plain water and have good cycles , either no harvest for you, maybe even at all. Some look very sad Less is more in growing !! plain water with every second watering added light calmag, like 0.25-0.5 ml/L max !! some beneficial bacterial feed for roots would be wise now too. something like mycorrhizae You can finish them and some how normally even, just slow down, too much don't work here, you have to know time and amounts, not just stupidly bombard. Happy Growing !!!

Overfeeding. You’re running 3-4 stand alone Veg formulas.. why???

btw... here is an article on magnesium deficiency - causes and what to do about it.... (oh, and another cause could be overwatering...) https://www.growweedeasy.com/cannabis-plant-problems/magnesium-deficiency

I'd LOVE to check your diary - which one is it? You can easily link your question with the right diary by opening up the diary and going down just below your comment... you'll see a place where you can ask a question.... Looking at these pictures, however, tells me you've got a severe case of magnesium deficiency.. either your pH is way too low or you are overfeeding with bloom nutes which can cause a lockout... Since I can't figure out which diary it is, I can't tell what the specific problem is - and I don't want to have to go through 4 diaries looking at all the pictures trying to figure out if THIS is the diary you're referring to.... Good luck