Leave tips brown and curling up.....

I know there are other posts on this issue, but I haven't seen other pictures that look exactly like mine. Any idea what could cause my tips to brown and curl up?

It can't be from too many nutes because I only fed one time lightly two weeks ago @ 500ppm and since just using water and a little Cal Mag.

It is 2 weeks in full flower, 7 week old auto, planted in 5gal grow bag of Happy Frog soil. Have 240W led over it and watering every 3 days right now. 8

Most likely its a nutes burn + some heat+ low humidity, but I'm a noob, better wait for others opinion

Potassium deficiency.

Well if you know it's from too many nutes, then it could be a lack of them. I got problems with mine even after stopping feeding because the soil was still really hot and it takes so long for soil plants to show symptoms.

I've seen a few autos that were burning their leaves just like yours in FFOF. Mostly they were smaller than yours though. There's a lot of stuff in that mix and I know it says super for seedlings on it but it's hot man. If you haven't been putting a lot of fluids through her then I'd give a real good flush the next time she got dry. If you've been washing the roots well all along then I'd go with @hotrodharley.

It’s Happy Frog. He’s far enough into flower even OF would be getting depleted.