Any one have a clue what this could be, alien tech in soil …. Starts out like first two pics and quickly progresses to below
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Only thing I can think of is checking humidity how much water plant is given and room temp
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Looks like either a N toxicity or root issue to me brother. Are they sitting in runoff after watering by chance?
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it is the “claw”, nitrogen excess / toxic. you can try a bit of calcium and magnesium to boost the plant metabolism . back off nutes and flush well. calmag supplement is usally 2-0-0 more nitrogen so use the other type calcium . cant rembers what it is called sure someone will chime in. good ole epsom salt for the magnisum.
possible over watering but usually plant will also turn yellow from to much water. so do not flush if that is what is taking place. @FirstCavApache64 pretty saying the same thing.
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No they aren’t but I’m thinking it could be overwatering partially anyway
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Over watering can also screw-up the ph over time leading to toxicity or deficiency issues. I’m sure you’ll get it turned around brother.
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Looks like a nasty N imbalance. I think mainer J was looking to say gypsum for a calcium bump with out N. Gypsum can render over concentration of nutes unusable by bonding to them I believe, not certain about the mechanism, but certain of the use. Search gypsum soil remediation and I’m sure something will pop up.
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Thank you , it’s actually not even my plants but I have no clue how to help , so I opted to ask my homies. Much appreciate your help brother
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Thank you for the advice very much guys. Hopefully this gets straightened out , these beans are rare and special , don’t wanna see any go to waste, I think it has a sensitivity to N if it’s the case as others around are fine, yet fed the same
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I see that clawing too exaggerated to be a N toxicity 
being other plants fine with same food. Not saying it can be but just in case there may be broad mites (hope not), check this info and compare … 
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Thanks @George i was waiting for you to chime in , always appreciate your input 
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I’m learning from all of you, wish this time I’m wrong …
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So do I my friend, so do i
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If you do think it is fert related.
This is a good way to reset the soil CEC.
This was posted by aspen over at the lab.
Good luck buddy.
normally I spoon feed it twice to three times a week…
Basically I mix up to around 10 gallons for 15 plants at 300ppm.5 scale and add some good Magnesium bringing it up to maybe 450 ppm.5 scale ph the solution
and feed that at lights on then a few hours later I’ll feed the normal base nutrients. I use Diamond K and when mixing it I’ll take my time and let a small
pump run to circulate it at first it will look cloudy after it mixed for about 20 minutes the solution clears up and it’s ready to add the mag you want the
solution look clear before adding anything else to it or using it otherwise the coco acts like a filter and traps the gypsum on the surface of the pot…
also lay into the calcium pretty heavily remember Ca is the first element to fall out of coco and the easiest to wash out with too much runoff but slownickle
told me one time that it was the key to quality and weight so I never looked back and quality and weight have never been an issue for me.
You really have to get the CA into the root system and keep it in there all the time…… also this isn’t just for flowering plants I start spoon feeding Ca as
soon as rooted plants are potted up also its the best way to condition coco for that I go with diamond k at 450ppm.5 scale and 6.0 ph
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Thank you my brother, much appreciated
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Hey buddy heres a sight that might give u a better diagnostic of ur problem 
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Hope it helps.
https://www.growweedeasy.com/cannabis.symptom.pictures
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Thank you @jamMAKEcan 
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Your welcome fellow OG’r. Anything to help.
Love it, that’s been my motto for a while now around here. respect
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The classic is too wet
Also wind damage fans too close and too hi
The leaves are very dark so it could be n toxicity
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