Gardenia Leaves Small Black or Brown Spots
This poor gardenia bush has been having all kinds of problems. Please see picture for latest development. What is it and what can I do about it? Thank you.
Certified GKH Gardening Expert
That appears to be a severe bacterial infection. These can be very difficult to treat. You can try a fungicide. This article will help: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
This article will explain Bacterial Spot: https://www.gardeningknowhow.com/plant-problems/disease/bacterial-leaf-spot.htm
This article will help you to care for Gardenias: https://www.gardeningknowhow.com/ornamental/flowers/gardenia/gardenia-plant.htm