Gardenias

Question

My poor little gardenia bush is pathetic and has not changed in over 15 months. I have fed it and talked to it and I’m at my wits end.

Answer 1

Sometimes the site is the issue when plants just don't produce. It could be a soil problem, or exposure. Maybe try to move it to a different location. This article may help
https://www.gardeningknowhow.com/ornamental/flowers/gardenia/gardenia-plant.htm