Not sure what this is.

Seeing this yellowing on a couple leafs been progressing a little but not widespread. Pictures are attached. PH is 6.5 going in and 6.4-6.5 going out using a 75/25 ffof/perlite mix. Plants are under a 600w HPS its 4 different strains of autoflower. Amnesia, Purple Kush, Midnight Express, and Candy Kush. Plants have been healthy overall, if you need more info just ask. Plants are 4.5 weeks old.

Found this chart on here. Hope it helps.

AKgrower29 said:

Seeing this yellowing on a couple leafs been progressing a little but not widespread. Pictures are attached. PH is 6.5 going in and 6.4-6.5 going out using a 75/25 ffof/perlite mix. Plants are under a 600w HPS its 4 different strains of autoflower. Amnesia, Purple Kush, Midnight Express, and Candy Kush. Plants have been healthy overall, if you need more info just ask. Plants are 4.5 weeks old.

Click to expand...

you know its your nutrients or lack of. time for food man, fox farms isnt feeding correctly any more?

I have been feeding nutrients, I guess I should have added that. Fox farms trio with Cal/mag and kangaroots. Started open sesame about a week ago. I feed every other watering. All new growth looks good, nice and green no issues just don't want this issue to spread. It seems to be contained to the lower middle/half of the plants and is not constant but more spread out.

Have you checked for bugs?

Certain leaves effected while others are healthy. Sporadic white dots on the effected leaves. With said dots turning to brown in the center with a gold circle going into yellow.


Thirps.

I've looked for bugs but haven't seen anything. Does that damage look like it's from bugs? The only damage from bugs that seems similar is fungus Gnats and I've looked for them pretty good but I'll check again.

Nute problems affect numerous leaves. I can see you're running the plant hot from the burnt tips. That's a no biggy.

Thirps on the other hand, camp out on one leaf first then spread. It can happen overnight. You'll see white dots on one leaf. Usually a major fan leaf. The white dots are from where the bugs are eating the juice of the leaf. Once the damage happens those white dots will turn brown in the middle. Enough bites to the leaf and it'll curl. It'll make you think it's a fertilizer problem when it's bugs.

Ok should I remove the leaves from the plant? I never really saw spots like a bite. More so just a mottled pattern on the leafs then they turn a brighter yellow and migrate to a brown and they dry out.

No. Leave it alone. Consider Neem oil or Pyrethrin. Mist the soil and the effected areas. Solo brand, 1 liter plant sprayer is what I use. 1ml of Southern Ag brand 1% Pyrethrin to one liter water. Half teaspoon of veggy or mineral oil. Couple drops of dish soap. Shake it before you spray.

Don't spray the buds. Stems, leaves, and soil are ok.