Need help really bad

I have seven ak-48 females plaants that are in the three weeks of flowering all the leaves are turning lime green then yellow and then dying.... i dont understand whats happening im only watering when the pots are very light to lift giving them 1/2 strength nuts (dyna-bloom and mag-pro and pro-teck) my lights are 600watts hps room temps are always around 82-84 huminity it around 60 plenty of fresh air and excaust... i would really apreciated any help im posting some pic's for you to see

looks like normal leaf dropping but i would get a second opinion. maybe get the nutes up to full strength because they dont look burned if anything they look a tad deficient.

the plant will use all the nutrients in the leaf and it will turn yellow and fall off, its a natural thing sometimes and the leaves in the pics all look healthy (no burning or cal/mag deficiencies)

try increasing the str of the nutrients and make sure there is some N content in what your giving them, dont need much but they still do use N in flowering just not as much, if they are deficient they will pull it from older growth to use it in the new growth in the buds. also when a plant starts flowering it gets hungry and uses alot more nutrients than when in veg.

anyways get a second opinion but this is my thoughts

I'd say it needs more water. My moms get that way when I cut back on the water.

ur good dude, as long as it's the lower growth you're ok. You can tell because they are solid yellow; not spotty or patched. It will happen more and more.

They look like they are motly N deficient, but at that stage of flower, and it being predominantly a Sat, I'd start feeding some cal/mag as well. Up the nutes to full strength, and watch the levels of Mg. SOME yellowing and dropping of lower leaves is normal but that is overall chlorotic.

i agree with nitrogen deficiency as those plant are sucking it from the lower leaves. increase the nutes and GL

just want to say that tomorrow i'm takeing the advice of uping the nuts and i will keep you updated on the outcome. its really nice that there are sites like this that people are very helpful.... again thanks to everyone.

I am in rock so in my situation where the table always has the same nute level giving them more water would also be giving them more nutrients.