Activity › Forums › Grow Tips › Coco perlite mix turning green on top layer what is this and how to fix if bad › Reply To: Coco perlite mix turning green on top layer what is this and how to fix if bad
It sounds like you might have algae growing there. You could also use an Enzyme to kill it directly. I would lightly till the top of the medium and let the plant dry out a little bit before watering again. Then water less often to avoid it in the future