Q.Gardenia – Too Much Water
I think I overwatered my gardenia. The soil tested okay, but half the leaves are now yellow. Should I cut off those leaves or transplant it to another pot? Due to cool weather, the soil is not drying out it seems, and I don’t want to lose it. There are also a lot of flower buds, and I don’t want to lose them either at this point. I have had the plant two years and it is finally going to bloom. What should I do?

Certified GKH Gardening Expert
The following article should be of some help to you:
https://www.gardeningknowhow.com/ornamental/flowers/gardenia/helping-a-gardenia-bush-with-yellow-leaves.htm