We always miss a few offsets when we move them, but usually don't get motivated to go back for them until they flower 2 or 3 years later. Seem to multiply and grow well left in the ground around here. Reliable booms may be another story. Casual impression is that flowers have been more dependable their first year in a new spot. So, digging and replanting with a dusting of bone meal or other food might be a factor.

They are hardy to zone 5 and are typically planted in fall with the other spring blooming bulbs. And like them, they require very good drainage and lots of sun. In milder climates, they will produce foliage in fall and flowers in midspring. In colder climates you may not see any growth of foliage until early spring as well. Other than that, they are not at all fussy and should bloom without issue, however I have found them not to perennialize (return reliably) very well and are best replanted annually, much like most tulips.

Thanks Irisgal! I'm more asking if it should be 3-4 inches tall right now. I'm not the type to cover it every cold snap so I guess those tips are going to get burned!

Some Dutch iris are better at persisting than others (try the blue and the blue/bronze one), and they are fine over summer as long as they have good drainage. Supposedly they are not tasty to gophers.. but I have had them disappear faster in the open garden than in wire lined beds. It helps to divide them in Fall as they tend to form a clump of small bulbs around the original. I. reticulata and its relatives is an annual like Hybrid Tulips here in 9/10 - its just not cold enough in Winter to simulate their native conditions - from Brian Mathew: Iris reticulata and its relatives are mountain plants native to western Asia, and thus used to hard winters. I have seen reticulatas growing in areas of Turkey and Iran where the winter temperatures certainly dip regularly to -25°F, although normally with good snow cover. Winter hardiness is therefore not in question. The success or otherwise of these delightful spring bulbs lies more in the summer conditions, as the bulbs like to be dormant and almost dry from early summer through to the autumn, when root growth commences once more.