potassium defiency

is this potassium deficiency, grown in promix hp under hlg 550 and use general hydroponics

looks like over fert. you should give more details if you want a better answer. how much do you feed? how often? what's the highest temp the plant is exposed to? using all three bottles? anything else?

shouldnt be overfertilation temp is 84 to 86 and follow the dtw feed chart. 5ml micro 5 ml grow 2.5 ml bloom per gallon. feed once a week

room temp too hot also. looks sativa dominant, sensitive to nutrients. You're cooking that plant with heat and food.

the plant is northern light my dude, pure indica. i dont mean to argue my man but my leaf surface temps is 79 degrees on average during the day. if were an hps grow it would be hot but i dont have the far red spectrum from my lights, you really think that 650 ppm a week is torching the plant?

PH could affect k uptake.
Double check your ph accuracy is my only suggestion. I only kno coco.

you know what, coco is my specialty too. never had an issue with my coco plants as well, thats why i dont think the heat/nutes are the issue. and i really push my coco plants feeding 3 or 4 times a week. my personal thought is the calcium in the promix (dolomite lime) is affecting/locking out the K

That's a sativa leaf.

i mean unless the breeder sent me the wrong seed. i ordered northern lights. Leaf kinda looks similar to me, unless nl has a sativa ancestor and i got the last pheno of a sativa nl around.

I though NL was a hybrid so maybe that's what you have. skinny leaf like that are sativa, not indica.