Me personally, I keep the scape and let them bloom. For one I want to make sure it is the correct plant. I have gotten plants that are not correct and if I would have cut the scape I would have known that until the next year. Second, I hybridize so I'm wanting to get the pollen to use/save.
What a lot of people do is let it bloom at least once or twice to make sure the plant is the correct one and then cut it off.
