Pic at bottom should b in the middle

Looks like the start of a Ca- to me as well. The other one is a K issue in my opinion. For the Ca, go with both foliar and root drench applications, you've caught it early so can probably easily stop progression. K issues are pretty easy too, I usually go for seaweed but other products will work, too.

My own experience with bleaching, the plants looked just like someone had thrown bleach on them. Uneven areas, bleached white. I wonder if I have any pix still... hold on, gimme a sec. The bleaching started after I put the 600W HPS they'd been under on a mover.

Seamaiden said:

Looks like the start of a Ca- to me as well. The other one is a K issue in my opinion. For the Ca, go with both foliar and root drench applications, you've caught it early so can probably easily stop progression. K issues are pretty easy too, I usually go for seaweed but other products will work, too.

My own experience with bleaching, the plants looked just like someone had thrown bleach on them. Uneven areas, bleached white. I wonder if I have any pix still... hold on, gimme a sec. The bleaching started after I put the 600W HPS they'd been under on a mover.

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Do you think it's to much or not enough of it,i had a idea it was the k but wasn't a 100% on it,i definitely knew that was a ca deficiency but again is it to much or not enough, i got shogun cal-mag ere an shogun pk 9/18.i made a mistake of giving them advanced nutrients B52 an that's got 4% k init,only a few feeds with it but then i noticed the 4% k in it an stopped, so they were having the k at 18% from the pk 9/18 plus what was in the actual bloom which i have no idea on the NPK cause dutch pro don't let you know on the labels, so im assuming it's way to much,even though i only been using 10ml of A an 10ml of B which it no way enough feed for 5 weeks in flower i know this but the directions on the shogun pk 9/18 state to drop your main feed by 25-50% because of the high amount of k,i lowerd mine lower not much,there not hungry unless there needing more k but i can't see it,thats why i ask if i have put to much or not enough in,it's only centered under the light,that picture were the leaves are yellow an drying edges is the only branch on the plant that looks like that the rest are ok,like i said it's only centered under the hps

Deficiency means it is lacking or missing the needed amount of a certain nutrient.

Toxicity is when you have too much of a certain nutrient.

So you need to add Calcium to correct the current problem.

Best of luck .
Peace

Check your ph make sure your not locking out
Do not use Cal/mag you will push them into Ntox
Read Sea's posts on how to do it. She types better than me and very probably no's more to.

Don't think I know more, I know I definitely type more. D'oh!

@Smokeingdog -- please keep in mind I haven't used the fertilizers you're using. For me a Ca- means AFTER you've determined your pH isn't playing a role that you would need to start applying more and, again for me, paying attention to the Ca:Mg ratios. I would be willing to be they're a bit low in that Cal-Mag product you're using. I'd like to see it at a minimum of 4:1 Ca:Mg. If your cal-mag isn't that ratio, find a Ca feed to give them. Even bonemeal tea will work (but be warned, it smells a lot like death. Or gack).

That said, before adding more, trying adjusting pH as suggested above. It's the easiest thing to change and is usually the first thing that causes problems for most growers.