Zinnias and Powdery Mildew

The zinnias I planted were doing very well but have developed some white dusty leaves and aren’t looking as healthy. What am I doing wrong? Over-watering? Is this mould?…

Indoor – White Fuzz on Soil

Hello. I have a few small indoor plants that have white fuzzy stuff on the top of the soil. The room is cold and dry ..could it still be fungus? I have never seen any gnats or any other insects.…