Hey Harvey- I have one nobile too and I read that once the nubs- inflorescences start that normal watering should begin to support the flowers. (not sure about the fertilizer) I also read that keeping the nobile in average light and a little cooler temp would help the flowers stay in bloom for a much longer time. I too am a "newbie" with the nobile, so we can compare notes.
On my nobile, the bottom nub, bloomed one flower and blasted the other bud, but going up the stem I have 5 other nubs, so I am hopeful. My nobile is very small, in a 2" pot. The cane that is blooming is attached almost like a keiki....not sure I am going to treat it that way. I will post a picture later today!