Cal-mag def?

Growing in subs supersoil and ffof under an Amare se-250.
6 week flower.
Ph water only, looking for a solution.
So far only affected the bottom leaves.

yeah, as nutrients are depleted towards end of flowering cycle naturally old non productive leaves are shed. pull it off at once before the others see it. I see it on my fruit trees and berry bushes too every year. look outside in the fall, less poop, less light, season end.....

chemphlegm said:

yeah, as nutrients are depleted towards end of flowering cycle naturally old non productive leaves are shed. pull it off at once before the others see it. I see it on my fruit trees and berry bushes too every year. look outside in the fall, less poop, less light, season end.....

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Remove the affected leaves? Others see it? Could I supplement with some molasses?

STX.OrganicGuerilla said:

Remove the affected leaves? Others see it? Could I supplement with some molasses?

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cut the leaf off of the plant.
others might see it=joke
molasses? you got some left over from the beef roast?
no , dont ever add molasses to finishing marijuana please.

nothing you can add can make that leaf look healthy again. it happens on most plants in my forest, its no issue

chemphlegm said:

cut the leaf off of the plant.
others might see it=joke
molasses? you got some left over from the beef roast?
no , dont ever add molasses to finishing marijuana please.

nothing you can add can make that leaf look healthy again. it happens on most plants in my forest, its no issue

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Lol. So no cal-mg, I'll check runoff ph and make sure it's not lockout.

STX.OrganicGuerilla said:

Growing in subs supersoil and ffof under an Amare se-250.
6 week flower.
Ph water only, looking for a solution.
So far only affected the bottom leaves.
View attachment 3916766

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those stems look awful purple???hmmm

thumper60 said:

those stems look awful purple???hmmm

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Look almost totally green with a slight dusting of red on the top side to me and stems can be purple just due to genetics. You can never point at one thing on a plant and make any kind of accurate diagnosis of anything.

Totally normal for some of the old fan leaves to discolour later in flowering and can be a good indication that the plant is being properly fed and starting to draw on it's own resources as it should near the end of it's life. I leave them on until they are totally used up by the plant then they often fall of on their own.

If anything I'd give it something with sulfur like epsom salts to boost resin production or OverDrive if you're into that sort of thing. Some molasses wouldn't hurt to feed the micro-herd in the soil so they can naturally supply more food to the plant.

Let that leaf do its job and fall off naturally with just a slight pull. Often removing damaged leaves just ensures it'll move up to the next one. Without knowing more details its really difficult to diagnose from looking at a single leaf. Fresh water, some Sulfur/Mag (Epsom) or a simple AACT of EWC/Molasses to feed your micros could help a lot.

Wait...FFOF? That "could" be fungus gnat damage. Those bastards have sent me chasing my tail looking for deficiencies. See any flyers or anything crawling around?

Burnt. Burnt slap up. You overdosed them on nutrients and burnt the hell out of them. That's why you also have "the claw" working on all the other leaves.

Tangerine_ said:

Wait...FFOF? That "could" be fungus gnat damage. Those bastards have sent me chasing my tail looking for deficiencies. See any flyers or anything crawling around?

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Fungus gnats only damage the roots. The adults just fly around, mate, lay eggs and die. They don't feed as adults but their larvae feed on the fine root hairs eventually killing the plants if it's a really bad infestation.

TacoMac said:

Burnt. Burnt slap up. You overdosed them on nutrients and burnt the hell out of them. That's why you also have "the claw" working on all the other leaves.

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What pic are you looking at? I'm not seeing any clawing going on. A pic of the whole plant would be nice tho.

you're at week 6 of flower....look up the word senescence, because thats what that is. its a natural thing and while you can stop it, theres no reason to. you can load the plant up with nutes just short of the burn point and they'll stay green to the end, but thats not natural or necessary, and will contribute to a harsher smoke imo.
built soils will almost always peter out before the end and you have to add stuff to it. your plant ate all the mag in your soil, a small dose of cal-mag wouldn't hurt, but keep it small, you have 2 or 3 weeks before that plants done, don't nute load it now, just keep feeding it the way you have for the most part

p.s. molasses is to feed your beneficial microbes, if you're using them, plants ignore molasses, the molecules are too big for them to digest, mostly.

OldMedUser said:

What pic are you looking at? I'm not seeing any clawing going on. A pic of the whole plant would be nice tho.

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The great big one at the top...you know, the one where the end of every single leaf in the picture is curling down very sharply and turning very dark. In another couple of days or so, those too will start to look just like the other ones. He overfed them big time.

that is slight clawing, but the leaf damage is from mag deficiency, not a thing in the world to do with over feeding N

OldMedUser said:

Fungus gnats only damage the roots. The adults just fly around, mate, lay eggs and die. They don't feed as adults but their larvae feed on the fine root hairs eventually killing the plants if it's a really bad infestation.

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Yep. Exactly and that kind of root damage will eventually express it self by mimicking deficiencies or "ghost" deficiencies in the lower leaves. "IF" its due to FG, then adding Epsom salts wouldn't help and could potentially make things worse. That's why I asked the OP about pests. Not because I think FG actually chew on leaves....though I have seen the little fuckers burrow right into open stem wounds before.

I noticed the leaves and "slight" taco'ing as well but without see a pic of the whole plant its hard to say if its nute burn. It could be burn I guess but I'm not seeing that. The light source may not be adequate. I've never been a fan of Subs Super Soil and the whole "layering" theory I believe is flawed.

And again, without seeing a pic of the whole plant and knowing more details its imposible to know. It doesn't look far enough along from what I can "see" and my answers are only based on the limited info the OP provided.


Maybe to be safe, foliar with Epsom first? I dunno, just trying to help and not add to his problem that's all. More info is def. needed when these type of questions are asked.

Roger A. Shrubber said:

that is slight clawing, but the leaf damage is from mag deficiency, not a thing in the world to do with over feeding N

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We'll see. When I first started that's exactly what happened to me. It had absolutely nothing to do with Cal/Mag. It looked exactly the same.

He's not "feeding" the plant if he's in supersoil doing water only? I would think any type of burns would've showed up long before this if the soil was too hot. Unless the OP up-pots or top dresses a lot?
If anything the soil would be a bit depleted.
I'm still leaning toward mag def (not cal) and possibly gnat damaged roots. Either way its pretty hard to over do mag and the sulfur will def help with ripening and trich development. But what do I know...I haven't even had a coffee yet.

Thanks all for the tips and info, much appreciated.
I found major bananas popping out of buds so I decided to chop her down in order to avoid pollinating future grows.
I pulled the root ball and there were no signs of fungus gnats or larvae of any kind.
And as tangerine said I was not feeding and as the plant had been in that soil mix for over a month with no signs of def. it was def not over fed or hot soil. I do think my mix was high in n forsure due to the affect on another plant(major clawing).
I have 3 more, much more stable genetics, coming up quickly.
Very much appreciated info though guys!
Also as stated I tried to go light on my mix so if anything it would be deficient rather than toxic.

The next gen. Started under t5 in happy frog ocean forest mix +perlite and ewc.
Better luck this time. Less N and a pinch more mg and hopefully I'll get my 1st successful harvest. Will move under the 250w led soon.