Jeri, most iris germanica rhizomes will offer flowers the spring after they're planted, though some varieties seem to dwindle to nearly nothing in late summer (that's when they're dormant). They hybrids I speak of are ones I've created from crossing different flowers and then planted the seeds and it does require 2-3 years to see the result. Also, now is the time of year to fertilise iris rhizomes (now and in March) in order to have a good bloom from them.

cheers,

Aux