Hi guys, still don't know what this is. It's slowly progressing even though I have started giving nutrients again. I'm growing in soil and I have runoff every time so could it still be a PH/lockout issue? Notice the brown dotting around the edges.
Perhaps a combination of acidic soil and Calcium deficiency.
Looks like it is flowering. So maybe to much Potassium?
If you post your grows it will be easier to track and pinpoint problems.