What the actual fuck

I have...no clue...but this looks pretty bad.

 

Iron ,, magnesium .
Marijuana Nutrient Problems & Symptoms by Picture | Grow Weed Easy

 

I cant tell you its PH because no one is testing the soil/compost PH levels .
For the nutrients and minerals you can buy a Soil nutrient test kit for about 40.00 bucks .

You can buy a Nutrient Photometer for a grand too .

 

How big are your pots? Can you post a photo of the whole plant with the pot?

 

I’m with @Sc00byD00bie , not a big enough pot. You’re running outta space for your roots. I would be looking at 10-15 gallons minimum for a plant that size in organic soil.

 

This IS the organic section tho.

 

Well theres your problem right there. First that "soil" is crapola... The only big companies product I like is the Promix - not saying its great - but for the money its ok as a base and never had any issues that I could blame on it. Bottled chemical nutes are just plain rubbish and kill soil life. You can grow a plant with them that will look good and have high thc, but you will NEVER touch the terp and cannabinoid levels of regenerative cannabis.

That being said to try to help the situation you are in - I would topdress lightly with some worm castings or compost and apply a basic AACT. Make sure to let the plants dry out properly between waterings. At this point from the looks of that plant it will never fully recover, but you can still get some good herb off it, it will just be a smaller harvest. After the AACT just give plain water, if it starts to show healthy new growth then give it more food - but give HALF of whatever they're telling you to give. The chemical pushers always try to get you to over fertilize so they can sell you more. I also think just plain humic acid in water can help remedy lockouts and stabilize the nutrient cycling. Good luck, get off the bottle and on the probiotic train.