My broccoli and pepper plants appear to be lacking something. I'm seeing some yellowing between the veins. Anyone have any ideas?
My parameters are fine. pH is 7.0, no nitrites nor ammonia. I alternate buffering with two things:
- limestone powder containing calcium and magnesium, among other things.
- Potassium bicarbonate
I added liquid iron as recently as two days ago to see if that would help. No noticeable difference.
Any leads would be appreciated!