Any ideas on what is happening to my plants. Basically it started two weeks ago. The major fan leaves from all different sections of the plant starting turning light green and slowly to yellow from the the tips going in until the whole leave is unformly yellow. Then it starting spreading to the smaller leaves. The fan leaves stems are dark purple. It started on a couple plants and has since started on about all 10 of my girls. The sickest plants fan leaves are starting to die off. They don't really get crispy or anything just stay yellow and then the stem detaches form the plant.

Background info.

10 lowryder #2
600w hps and 440w hps
Temps 70 degrees
Soil Fox Farm Ocean Forest
Full line fox farm nutes
PH meter says runoff is 6.6 and I calibrate it.

They are 47 days old with about 20 more days to go. I'm afraid they might not make it though its happening fairly slow.

I have a feeling its N defiency but I'm using the full line fox farm nutes.

2 waters ago I gave them a flush with clearex in hopes it was a salt build up issue and 5 days later things still getting worse.

So I gave full strength nutes for only the second time in there life today.

Any ideas?

First pic day 38 you can just starting to see some of the plants starting to light green/yellow

Second pic Day 41
Third pic Day 41 good/bad plant
Fourth pic Day 47 you can see most the plants turning and the tall plant looking the worst
manels1111 Reviewed by manels1111 on . Nute Problem 20 days to go? Any ideas on what is happening to my plants. Basically it started two weeks ago. The major fan leaves from all different sections of the plant starting turning light green and slowly to yellow from the the tips going in until the whole leave is unformly yellow. Then it starting spreading to the smaller leaves. The fan leaves stems are dark purple. It started on a couple plants and has since started on about all 10 of my girls. The sickest plants fan leaves are starting to die off. They Rating: 5