So I thought I had a little light burning in one of my girls first leaves this due to some foliar feeding a I did during their first week, but now it kinda looks like is spreading so I'm wondering if it might be some calmag deficiency?
Hi there you are over watering/watering to frequently which causes problems like nutrient deficiency. I wouldn't worry to much about the lowest leaves as they do fade quickly into a grow. Let top inch of your medium dry before water/feed. I would start adding nutrients as well. Good luck
stop the spray feed, increase the humidity, above 60, or try to decrease temperature to 23c, don't let coco dry on them, and don't feed till they recover. and they will happy growing :)