Nearly always when a new plant doesn't bloom for me, it increases at a much better rate then one that has bloomed. However, that's not an absolute, but a generalization. I've also learned that if I make a seed pod on a bloom, that it seems to increase even less. I used Ginger Ice really heavy this year (5 pods) and it just has a few tiny increases, and I doubt if it will bloom next year. The percent of bloom from new plants I think, may be greater in areas with a longer growing season. Up here, it's often 40% or less for newly planted irises. Of course with the rot I had this year, it was probably less then that. Last year I had several new starts that I planted in June, and I had a better bloom outcome from them then those planted in July or later. There are so many variables that it's hard to generalize this hypothesis too much.
