I also think Bigsby has this right, despite the very limited information. I had this problem occur last week after I improved my lighting, but it didnt get quite as far along. I increased my nute strength slightly and added some calmag, the plants were healthier looking within 24 hours (I grow in coco so nute changes show really fast). Like Bigsby said, the brown spots wont go, but the leaves that are just slightly yellow with brown spots should green up a bit, giving you an early indication that you have found the cause of your problem.
PhatJay Reviewed by PhatJay on . What are these spots? I have several leafs turning yellow and brown spotting. Ive seen a few pics, but some pics look the same. What are your opinions? 282380282381 Rating: 5