Question
what could be happening, I fertilize with Shultz 19-31-17. Thank-you for your response

Answer
It can easily take a month or more for long bloom spikes to develop buds.  You didn't mention how long you have been waiting fot buds to appear on the bloom spike.  Schultz 19-31-17 is fine.  As long as your bloom spike isn't dying back, it's going to require more patience.