Hi,
I am having the same problem with my Naga plant's flowering and but not producing pollen. I am growing mine hydroponically and my nutrients and ph are all in line according to the research I have done. I changed the light to High Pressure Sodium over a month ago in order to help with flowering and it definately helped the flowers.
I ran in to the growers that I got my Naga from (took the seed from the fruit) and they were saying that there was a world wide problem with some of the Naga seed last year, she said that her plants produced almost nothing last summer. Could the seed that I planted be sterile? Or am I missing something? I have heard that humidity may play a part as well.
Any advise would be welcome,
Cheers!