Help identifying this problem ?

I've got this constant issue of my leaves turning yellow?! Now its affecting my cuttings & spread across a section of them. I'm taking its some deficiency of sort? So I've 8 in bud yellow as hell! Looking a mess tbh. Now they had been too long in veg but still b4 switching they were healthy. Now in bud all the leaves left are turning yellow. Plus more problems a section of the cuttings i took from the original 8 are turning yellow. These are in another room & are a good few weeks old? But what is causing this yellowing & dying of the leaves. I'm not mixing up the food! I've an associate who pops round occasionally who's provided these resources for me to grow, who mixes up a dustbin full of nutrients that i feed to the plants that are in bud. Now the cuttings are under a led light & I'm not sure what this other bulb I'm using is called? It looks like a larger version of an energy saving bulb? It doesn't run on a ballast i do know that much as i wired these up. But I've added 2 x 600w hid in that room which i believe was too much for the cuttings. As under just the led & this cfl bulb? The plants thrived! Switched on the 2 600's & then i see the leaves turning yellow. But this cant account for all the yellowing of the plants in another room that are way in bud! So along with all the yellow of the ones in bud thats alot of unhappy plants! I need to desperately fix this issue!

You're going to need to provide pictures and give the specifics of your grow, in order to get any reasonable suggestions.

Really sorry im trying to work out how to do that? Ive took all the pictures & have every smart device available. Im just not smart enough it seems to get the pictures on this message?

Cushdy said:

Really sorry im trying to work out how to do that? Ive took all the pictures & have every smart device available. Im just not smart enough it seems to get the pictures on this message?

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There is a tutorial basically you just use the upload file on the bottom right of your post

Hi thanks yeah im real shit & getting new stuff & i should know better. I did see upload a file an thought about individually sending each one jpeg but must be an easier way of just copying them to my clipboard on the galaxy & then pasting all of them into a message like this. Well i thought itd be easy enough & without pictures no1 can offer much in the way of help.. tbc

I finally managed to get these posted i'd be grateful of some knowledge of the problem.
How does heat stress appear on the plants? What characterises heat stress & could only some of my cuttings become affected as in the pictures. Reason i say this as for this room & these cuttings/plants the problem occurred rapidly it seems when i switched on 2 extra 600w lights?.. thats what makes think that? As for the ones in bud in the other pictures theyve lost loads of leaf to it turning yellow & dying off. Why are they so ragged looking? Admittedly those ones in bud had a protracted veg period & a nightmare start to bud! On & off lights for first few days till i fixed the problems! But yep thats were im @ any help i'd be grateful

Nute burned for sure. Are you giving micros and cal mag? It's not lights.

the problem with this first grow is i'm not responsible for mixing up the food. im left a binful & am thinking its breaking down whilst sitting in.the bin waiting to be used? has to be only explanation?

not enough mag

It appears from your pictures, that all your yellowing plants are under your LED? LED's can tax a plant differently than HID or fluorescent lighting. I would look into this. As Bernie420 said, it appears in those yellowing plants, you need to add more Mg, and I would dare say Ca as well. Heck, I'd even consider upping their feed some (those yellowed up). It may be, that with the additional light you added, your plants are being pushed a little harder, in terms of their growth and they aren't finding the nutrients they need to capitalize on the increased light. Some of your plants look pretty nice, so whatever your issue, it's specific to the plants in question more so than it's something happening across the board with your grow.