When can I trim a Gardenia bush?
My Gardenia bush has grown very tall and has so many flowers on it that it is laying down from the center out.
Certified GKH Gardening Expert
Each year, you can prune up to 1/3 of the plant, but no more than that. This article will help: https://www.gardeningknowhow.com/ornamental/flowers/gardenia/when-to-prune-a-gardenia.htm