I have a nobile hybrid which blooms heavily. I found it is crucial to stop fertilizing mid-August or it will keep initiating new canes at end of season. I reduce watering starting November, but with hybrids, you don't really need to stop watering completely. I open the window at night and it gets night temps around 50f each night starting in November. I resume watering and fertilizing once the buds are developing, usually mid-February.