My baby is getting these spots on her leaves shes about 8 weeks old grown in coco coir watered twice a day at a quarter gallon at the time shes in a 3 gallon pot I’m using sumatran natural fertilizer with numbers of 8-3-1 and I mix in 2-3 ml of cal-mag per half gallon of water every other feeding I got a jewlers eye I and didnt find any bugs on the leaves can someone help me???
And also my ph is at 5.8 with a runoff of 5.4 5.3
Light burn possible from water on leave.
Or maybe @garrigan62 has a better idea
Check the underside of the leaf, if no pests than I would agree with @Sasquatch
I have a couple spots like that on 1 leave on 1 plant. No bugs around