Renfro
Well-Known Member
Well test the soil pH and verify thats inline. I can assume you aren't over watering and basic stuff so thats where I am left. I have plants that try to be low and some that try to be high and some that stay just right. All the same feed and medium. Could be one of 4 on the same cut that does it.Yep 1 plant showing the spots
1 plant is yellowing
Coco/perilite
PH 5.8-6.2
If you haven't already, pickup a good soil pH meter like the Blue Lab or Apera. If I only had one pH meter it would be one of those and you can use it for liquids just fine.