Q.Gardenia Buds Don’t Bloom or Fall Off
I have a gardenia tree that I have kept in my sunroom. It has started to bud out but they turn dark at the base and never bloom. I pulled off a couple and they are dry and brittle but they don’t actually fall off. It is in a large container. I haven’t fertilized over the winter but I have kept it watered and use a spray water bottle to provide moisture. What should I do so the blooms come out?

Certified GKH Gardening Expert
It is possible that you have thrips. They are hard to see and they cause damage to the buds like that. This article will help:
https://www.gardeningknowhow.com/plant-problems/pests/insects/controlling-thrips.htm
This article will help if you feel it is not thrips:
https://www.gardeningknowhow.com/ornamental/flowers/gardenia/gardenia-flowers-gardenia-buds-falling-off-plant.htm
While your buds are not technically falling off, the causes for falling off would also be for buds drying out that was not caused by pests.