Despite my Hedychium Coronarium being well taken care of, it flowers rarely, and then only briefly. Most recently, a bud started to form, thickening to about the thickness of a pinky finger, and then did not develop any further. I gave it a squeeze and it felt empty. Its in a bright but sheltered spot, receiving full tropcial sun during the middle of the day till late afternoon. Watered every day so as to avoid the leaves going brown. Otherwise its very healthy and growing strong and sturdy. It's in a container. What might be the problem?

Thanks in advance for your help,
Mick