HELP!! What is this? Some sort of defiencey or toxicity

and while you're at it, tell us medium, lights, nutes, temps, rh, ph, and take a pic of the effected area, and the whole plant, in normal light....all that will be very helpful
 
If you using Fox Farms I wouldn't be giving it any other nutes, you may be burning it up. That Fox Farm soil has enough nutrients to get you through a month or so without adding anything else to it.
 
Its been many years since ive posted a pic but I used to just drag-n-drop. try that out because at this point we are literally blind and throwing darts in the dark in a middle of a tornado
 
I know this is hard with no pics I posted one on imgur and someone said they thought nitrogen burn..and also asked if I was at the end of veg and about to flower ..which I am

are your plants dark green and just the tips of the leaves burnt and pointing down? can you link to the pic on imgur?
 
testing
iu
 
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