Welcome to the Growery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!
I can't really tell from the pics but are the spots black? Are there any other discolorations or abnormalities? How old are the plants, and how often are you feeding? With what?
The black spots are bug shit. Mites, or whatever, you need to work on pest control. 3 steps I would take after washing the leaves with dish soap as suggested. You can just wash them once, then: 1) sprinkle diatomaceous earth on the surface of the soil. This kills insects that live, breed, or land on the soil. 2) mist the plant with neem oil. This kills mites if you have them and protects the plant from further attacks from any insect. 3) put yellow sticky traps around your plants to monitor if the pests come back.