Deficiency-esh looking leaves - need opinion

[AloeRuss]

Hey all
Snow Crash, Coconutz and the rest of you coco growers.
The leave in the picture. Majority of my plants have at least one. I started having them almost as soon as I moved them under 1000w.
Had the same thing last time as well but then it just worked itself out even though my PH was 6.7 for the first 2 month (I forgot I was growing peat moss for a moment)

Right now my PH is at 5.9-6.1

 

[smailer]

Looks like classic lack of Magnesium and Potassium (little bit shrivel leafs).
Sometime curling upward leaf margins is heat stress, but it's looks differently.

 

[Coconutz]

The leaves look pretty dark... If theres a deficiency there its probably caused by a lockout or too much of certain other elements.
I dont follow you on the PH circumstance you mentioned. Was that a previous grow, or this grow??
Anyhow... from the other posts youve made Id suggest you backoff your nutes and lower your ph.
You might even want to flush with a light nutrient solution at this point. .2-.4 ec
Can you get shots of the rest of the plants?
Did this happen after your foliar of forbid or whatever it was?

 

[AloeRuss]

Well. Here is something for you to consider..
This is a second grow. First behaved similarly during the late vegge as well, tells me it could be "too much of something". But first grow just straiten itself out once I stopped giving certain elements (nitrogen boost).

 

[Coconutz]

Just throw the N boost bottle away!
Cant think of a single time you will need it to grow cannabis...
If you find yourself low on N its time to switch base nutes or re-evaluate your growing method.
What other bottles of stuff do you have laying around?
I suggest you stick to base nutes until you get consistent quality results.
Ive been using nothing but 6/9 and some silica and never run into deficiencies.
Its far easier to give them too much! Especially when using a complete base.
If forbid is preventative you need to cut that shit out too!

 

[AloeRuss]

No. Forbid was to erradicate. Preventative I use liquid lady bugs n stuff.
I switch to bloom, so no more N for now. And I will stop with N all together.

I have some diamond nectar, cal mag, liquid karma, carboload, hydrozyme. Those are laying around.
I started with bud blood and monster bloom. No good?

 

[AloeRuss]

Smailer - I add cal mag with every feeding to help with Magnesium.
If you are correct, it doesn't seem to be doing its job.

 

[Coconutz]

Have you ever grown without all that stuff?
You should at least try to run half your plants without any additives and see if you need any of the stuff. Only add them back one at a time and see what they are doing and if they are worth buying. Thats a lot of stuff!
In my experience with coco you dont want to dump too much stuff in there cuz the cations seem to get out of whack.
Maybe others have decent results with lots of bloom boosters in coco, but I dont.
It seems like it builds up and fries the plants by the end if its over done.
My best results come when the leaves stay healthy and dont burn up.
Since you have discovered you have a high runoff level I would watch out with any boosts and get your feed EC within a more reasonable range.
Lowering your ph to 5.5 wouldnt hurt.
Thats a lot of perlite... How often are you watering?

 

[stihgnobevoli]

that's not magnesium. it looks like you have too much of something, i struggle to remember which one this is. but that leaf is it really crispy feeling? i wanna say too much phos but you also look like cal def. your ph you just lowered it and then this started happening right? you should go back to having you pH mid 6's even in hydro mid 6 is pretty good. in soil/soilless its great.


*edit* lol took me a second to remember which grow it was... what's your humidity? is it over 60? you might be suffocating your plants.

 

[vapor]

some planties are a bit sensitive to amoniacal nitrogen/// thai's i noticed did this a lot for me when i would hit them with meta naturals 16-0-0.

http://www.greenhouse.cornell.edu/crops/factsheets/nitrogen_form.pdf

 

[RetroGrow]

Duplicate post.

 

[RetroGrow]

No. Forbid was to erradicate. Preventative I use liquid lady bugs n stuff.
I switch to bloom, so no more N for now. And I will stop with N all together.

I have some diamond nectar, cal mag, liquid karma, carboload, hydrozyme. Those are laying around.
I started with bud blood and monster bloom. No good?

That looks like classic phytotoxicity from using Forbid.
Google it, or go to the broad mite thread, and use "advanced search". You will see plenty of examples of phytotoxicity. High intensity lights exacerbate the problem. Presumably you were using it to treat broad mites, which are unaffected by lady bugs, and are probably still in your room. If it wasn't broad mites, you should not have been using Forbid. It is a highly toxic neonicotinide, poisonous to every living thing. Some strains are particularly susceptible to it. It is very toxic stuff, and should not be used casually, or without protective clothing and eye protection, and should not be inhaled. Broad mites can be killed without using poisons, but that's another story.

 

[Coconutz]

That is classic phytotoxicity from using Forbid.
Google it or go to the Broad mite thread, and using "advanced search", you will see the exact symptoms from using Forbid. Some strains are particularly susceptible to it, and when you put plants under high intensity light, that exacerbates the problem.
Presumably you were using it for broad mites, which are probably still in your garden. Lady bugs will do nothing against them. If it wasn't broad mites, you should not have been using Forbid at all. It is a highly toxic neonicotinide, poisonous to every living thing, and dangerous to use. You don't need to use any poisons to kill broad mites, if that was your issue, but that's another story.

That looks like classic phytotoxicity from using Forbid.
Google it, or go to the broad mite thread, and use "advanced search". You will see plenty of examples of phytotoxicity. High intensity lights exacerbate the problem. Presumably you were using it to treat broad mites, which are unaffected by lady bugs, and are probably still in your room. If it wasn't broad mites, you should not have been using Forbid. It is a highly toxic neonicotinide, poisonous to every living thing. Some strains are particularly susceptible to it. It is very toxic stuff, and should not be used casually, or without protective clothing and eye protection, and should not be inhaled. Broad mites can be killed without using poisons, but that's another story.

Talk bout ocd
Broad mites at that!
Perfection!
woot woot!

 

[RetroGrow]

Right. Twist what I actually said, and make it into what you misunderstood.
Maybe you should read it over again. What I said was phytotoxicity, which can come from using Forbid. The only reason to use Forbid is if you have mites. I didn't say he had them. He said he used Forbid. There must have been a reason he used it. But enjoy your trolling.