Bud drop on gardenias

I have a potted gardenia, which has healthy leaves, with numerous buds; however they drop and do not bloom. It has bloomed in the past. I purchased it this year in May. My question is, “why does it not bloom?”…

Gardenia

I have a grafted gardenia which develops many flower blooms; however, they do not open. The plant is wintering inside in a west facing window. The room is kept at a fairly cool temperature. Any advice would be very much…