I am thinking I have a Calcium deficiency. I am useing Fox Farm Organic Forest with the Dirty Dozen line up fed full strength as scheduled. I was using distilled water without cal-mag. Once I saw the spots, got cal-mag and watered and have fed FF nutes at half strength with another dose of cal-mag. I have cut off a lot of the dry leaves, and the remaining brown spotted leaves have gained a micro amount of moisture. No new spots on new growth. Also, added a 3000w led light to my existing 1000w light. Thinking the light stress may have caused further Calcium deficiency or accelerated it.
Side note, brown spots had appeared mostly on two sativas, but also on 3 indicas slightly (they weren't as close to the lights). Since cal-mag indicas are growing fast, but with some glossy leaves on bottom.
Side note, brown spots had appeared mostly on two sativas, but also on 3 indicas slightly (they weren't as close to the lights). Since cal-mag indicas are growing fast, but with some glossy leaves on bottom.
