New Grower Problem with auto flowers at 7 weeks? Help

[Xgrundyx]

This is my second time growing autos. I'm using super skunk from sensi seeds. Everything has been going well but today ( exactly 7 weeks in ) I have noticed that leaves are starting to turn yellow and drying out/falling off and also the plants aren't taking in the water as fast as they use to, I'm using a hrydro tank system with 3 X 600w lights on a 22hour on 2 hour off cycle. The ph is sitting around 6.2 and temp of room around 19degrees. Does anyone have any idea why my plants are slowly drying? Thank you

 

[woody]

Hey mate sounds like they are underfed most likely need more P and K have you tried upping your base nutes.
Also a picture under natural light will help

 

[Invincible]

once they hyave gone yellow though you cant turn them back to green especially that late on in week 7

 

[CanuckFrog]

Hey mate sounds like they are underfed most likely need more P and K have you tried upping your base nutes.
Also a picture under natural light will help

I agree with sanguine on the P and K. Are you using any kind of high PK bud booster?

once they hyave gone yellow though you cant turn them back to green especially that late on in week 7

I would agree with Invincible if it was a longer strain. But if it was a real 8-9 week strain its pretty much time for it to start eating itself. Take a look here to get a better idea of what i am talking about https://www.autoflower.org/threads/the-life-cycle-of-auto-flowering-cannabis.5113/ .

Keep an eye on those trichs and leaves. One or the other will let you know when to flush when things start getting worse.


Then again a few pics could completely change my opinion of the matter. Just my theory based on what we know sofar.