Hi Liz.
from me too!! You've made an excellent start into Iris Addiction
and you're in the right place to continue right on down that happy path!!!
It helps to know that Irises *set* their buds the year before -- if they've had what they needed to do so. So -- you'll have a higher percentage of blooms from Irises that you purchased from professional growers than you will from friends and neighbors who are thinning their over-grown clumps. So any guess at percentage of blooms is just that -- a guess.
But you're going to have an amazing, exciting spring seeing Irises for the first time. It's what we all live for.
