Once a phrag has a couple bloomed growths, and assuming good roots and all that, it shouldn't take more than a year to re-bloom. Very often it will be much less than a year--some of them can bloom twice a year, maybe more. I have noticed that some phrags are so bent on *growing* that they will put off blooming for a while and keep sending out new growths. They may all decide to bloom at once, though.