Gardenia bush leaves are turning black and I have tiny white bugs everywhere that love to drink Sevin and seem to keep mulitplying. What can I do?
Certified GKH Gardening Expert
This is sooty mold. It happens when the plant gets a pest infestation. I would recommend using neem oil, as this will get rid of the sooty mold fungus and kill the pests. Here is some articles that will help you: