In my garden, I seldom examine the crowns to determine whether the new scapes are originating from the original crowns. If I have a "flush of blooms", and that is followed by a new set of scapes that bloom while those first ones are blooming I consider that to be instant rebloom. If there is a period of time between the first flush of blooms (a week or two maybe longer) in my garden that is called rebloom. Now I know Maurice is much more scientific and technical than I, but I wonder if when a plant is registered with instant rebloom and rebloom if the scientific terms are the ones used?
My way is just more useful to me in my garden. How do others determine instant rebloom and rebloom in your garden?