needrain,
I would think that instant rebloom is a rather modern thing and that the older plants would seldom if ever show it. On the other hand I would think the older ones that do have substantial rebloom would have a staggered bloom period and have up to three periods of rebloom. I seem to have the later type going on here, a bloom cycle then a rest and then new scapes. Orange Velvet is a perfect example: it bloomed early in the year and is just about ready to bloom again now. I must say there are some beautiful buds forming on it.
