Worse symptoms from 3-4 days.Gotta get them fast.Help Please!! :)

The pictures are from 4 plants it happend something like 4 days ago.And it is spreading fast.I don't know if it is ph lock or other deficiency so please help me . I water them with 6 to 7 ph everytime i don't have a EC pen though .I did a sample test from the soil with destilled water ( 10g soil 20-25 ml distilled water stiring for 5 minutes then letting it sit for 1 hour - It came 5.9 the one and 6.1 from the other plant - soil was taken from the roots).

The 2 yellow leaves are from a plant that doesn't have those yellow cirlce symptoms but it is losing leaves fast...
Those are 2 identical variaties 2 different plants

Those are 2 identical variaties 2 different plants

Really don't know if it is leaf septoria or Cal-Mag deficiency...

Thanks all for help and fast respond.

I wish I could help ! Could be low ph. Someone will chime in I’m sure.

How old are they? What soil and what are you feeding?

Plagron Terra bloom 40 ml - 10 liter max - Plagron Green sensation used it 1 time - 4 ml - 10 liters - and i used 1 time Sugar royal - 4 ml - 10 liters
I used almost half doses on all they are 4 week flowering. Soil is normal 5-5 - 6.5 PH and perlite - peat moss generally and soil that is in the ground. mixed
I also have catterpillar problems sprayed them with chemical insecticide - 2 times - but the first time they werent any problems.
Sometimes heat gets at 30 celsius..

^^^^ Everything you need to know hands down. Good luck.

HydroKid239 said:

Self Diagnose Your Plants

This is a thread I pulled from 420 Forums Its a usefull thread to diagnose plants. I take no credit for anything wrote. I just copied and Pasted The Pictures belong to them as well. Enjoy and Hopefully it helps those in need. Here is a ready reckoner for Cannabis plant and pest problems. It...

www.rollitup.org

^^^^ Everything you need to know hands down. Good luck.

Click to expand...

Thanks for the link i read it 3 times hah.But i found that lot of the symptoms confuse me and i can't make a certain decision.It gets sometimes worse than 30 degrees celsius i really think it is from them. But maybe you can give me a more final desicion . Really thank you in advance

In your OP (Original post for those who will inevitably ask) you stated you are doing between 5.5-6.5 Ph.

Thats an issue in itself. 5.5 is way to low for soil. Way to low. It might be part of your issue.

I suggest using this and typing in your symptoms.

:O