Upper leaves turnning crispy and orange and then eventually crushing to dust?

[JamesWolverine]

I have no idea what's going on, it started off 2 leaves it seems it's getting worse.
Can't be heat stress because my other plants are fine.
I also noticed some of the leaves are changing from green shade to dark chocolatey colour but they don't look damaged yet.

 

[JamesWolverine]

bump

 

[ebcrew]

Im not really sure man, possible nute burn or deficiency, possible pH lockout.

Heres some good charts you might want to go thru. i have also pH charts if you need them.

 

[Tone5500]

Im not really sure man, possible nute burn or deficiency, possible pH lockout.

Heres some good charts you might want to go thru. i have also pH charts if you need them.

View attachment 3427155 View attachment 3427156

That's a nice detailed chart haven't seen that one before

 

[Tone5500]

What stage and week is it in nutes, and medium ???