ultra yelllow leaves

My plants are all turning light yellow, almost white in the new growth. I've tried a different nute (first old age then AN conni) and it hasn't helped. I'll try and get some pics up tonight to show exactly what I'm talking about. It's like the yellow starts at the stem and moves out on the leaves.

The worst ones are clones in coco and the moms in soil have it, but not as bad.

Lady at the hydro shop said I needed more micros since I started with grow only. That didn't help. I used some 3d grow I got as a sample on a couple and there might be signs that it's getting better. I would like to know what caused it though.

ok post the pics and your growing medium and setup briefly

is your water ph 6.5 when its 7.5 or 5.5 its ten times off normal ph and it locks the door on some nutes so they never ger absorbed

bingo, checked PH, it it up at 8. I'm off to the hydro shop for some ph down. Haven't had to deal with it at my last scene but this new one appears to have a diff water supply or sumtin.

Ridgegoo said:

bingo, checked PH, it it up at 8. I'm off to the hydro shop for some ph down. Haven't had to deal with it at my last scene but this new one appears to have a diff water supply or sumtin.

Click to expand...

soil you want 6.5 and in hyrro 5.5 5.8

hrmmm. Ph is 6.7. Is that enough to screw up hydro? also, I fed soil plants with the same nutes I was using in hydro and they are showing the same signs, just not as bad.

Here's some pics of the moms. I'll go over and take pics of the clones tonight. Some are dying now. Could it have been from not hardening them off before putting them under a 1kw HPS? Or an overdose of superthrive? Also, the bushy plant is starting to recover, as you can see by the green returning to the leaves from the stem out, the same way that the yellow appeared, from the stem out. You can see on the less bushy one an example of the worst case, when the whole leave has become yellow, so pale it's almost white.

I've grown 5+ cycles in rockwool with GH and in coco with AN conni and haven't seen any of these problems. They resulted from coco with old age grow. I barely put any in, the PPM never got above 700 and I've flushed the crap out of them since then. could it just be a nute deficiency? I haven't fed them in a while since I was having problems. Just fed them some conni and foliared a little old age grow last night, we'll see how that goes.

Thanks for any help.

6.7 will def screw up hydro i that is where it has been for a while. 5.75ph