Gardenia Leaves Turning Brown
In the past it had powdery mildew and I sprayed it with a fungicide and it did well. Recently I noticed the bottom and inside leaves were exhibiting powdery mildew signs again. I used the same fungicide (same container) and it had been stored inside. Now the leaves are turning brown rapidly. Is this due to the fungicide or is something else going on. P.S. I did spray around 6:00 am so it was warm but not hot out.
Certified GKH Gardening Expert
This can be quite a complex issue. They can be a bit finicky about their environment. This article will help you to narrow down the issues so that you can find out exactly what is causing your issue: https://www.gardeningknowhow.com/ornamental/flowers/gardenia/brown-spots-gardenia-buds.htm