It's probably viral or fungus there are hundreds of different kinds and the only safe thing that covers most of them is Actinovate put it in your Google, I got a demotion for posting a link , you should be able to get it at a garden center.
lipps Reviewed by lipps on . Flowering clones turning brown. PLEASE HELP. What is your experience level? Novice/Experienced (I have done LOTS of research and reading, but not much hands on experience) Your medium: 1) Specific brand and type of soil? Fox Farm Ocean Forest with Fox Farm Happy Frog Fruit&Flower Top dressing. 2) Size of container? 3 and 7 Gallon (two sets of clones, a few are older than the others) Rating: 5