Rust colored spots on fan leaves

[Doc39835]

I actually am running 3 autocobs per plant. I've never had any light burn and the plants are huge, at least compared to my earlier grows with 1 or 2 lights. I'll plead ignorance as I've only been at this for a couple years.

Heres the ingredients for the CocoLoco . Appreciate your opinion on it.

 

[Doc39835]

Heres the ingredients for the CocoLoco . Appreciate your opinion on it.
View attachment 1065781

These 2 plants have 3 lights each . They are filling up a 6x8 grow space. The leaves look much better after your advice. Thanks.

 

[4d-Rock]

These 2 plants have 3 lights each . They are filling up a 6x8 grow space. The leaves look much better after your advice. Thanks.View attachment 1065782

Damn, that’s 2 plants?! Very nice, keep up the good work!

 

[Doc39835]

Damn, that’s 2 plants?! Very nice, keep up the good work!

A Cream Cookie and an LSD25 both from FastBuds about 6 weeks old.

 

[Dewey Matter]

Heres the ingredients for the CocoLoco . Appreciate your opinion on it.

No experienced opinion, but I'm 2 weeks into my first grow with Coco Loco (DTW) and there's no problems with it thus far. But I wasn't very careful when selecting a coco source and then was surprised this product wasn't just coco and w/ perlite.

 

[poneill88]

It is a PK deficiency; I had the same issue with my last grow Tangerine Dream and Critical Purple. I was running 2000 watt Led at 18 inches and during flower the lights were causing her to bud aggressively thus using a lot of PK and it pulls it from the fan leaves thus causing a chemical imbalance which caused the burn....I literally watched it under a microscope. I true test is to inspect the leaves not exposed to light and you will not find this burn. The good news is it did not interfere with the harvesting of some tasty high THC smoke.

 

[Doc39835]

It is a PK deficiency; I had the same issue with my last grow Tangerine Dream and Critical Purple. I was running 2000 watt Led at 18 inches and during flower the lights were causing her to bud aggressively thus using a lot of PK and it pulls it from the fan leaves thus causing a chemical imbalance which caused the burn....I literally watched it under a microscope. I true test is to inspect the leaves not exposed to light and you will not find this burn. The good news is it did not interfere with the harvesting of some tasty high THC smoke.

Good to know. Youre spot on, the leaf problem only goes a foot or so down from the top. I think the Bud Explosion from green leaf has high PK.I'LL check and if so increase it a little. Both plants are huge and stay hungry. Thanks.

 

[poneill88]

I gave mine a shot of Humboldts Big up powder 23&33% PK only gave it one shot as its powerful but it also made my buds bigger...

 

[Doc39835]

I gave mine a shot of Humboldts Big up powder 23&33% PK only gave it one shot as its powerful but it also made my buds bigger...

Looks good. Ive got some flower fuel thats similar numbers, 34 / 32 , never used it. Ive been giving it a gram of Green Leaf Bud Explosion, its 19/39. I might stop using it and try the flower fuel.