What and why is it growing on my Nobile Type Dendrobium

[Paul]

Originally Posted by Fairorchids

Reduce watering 90% after October 15th; combined with brighter light and reduced tempererature (if possible).

If the OP has a chilly room or windowsill for the winter, I'd say reduce watering more than 90%. Mine gets no more than mere sips once or twice a month in the winter -- just enough to keep the canes from shriveling. But my windowsill gets downright cold in the winter.