Iris winogradowii is a royal pain to grow! It is an alpine bulb and needs as cool as summer as possible without drying out much. Those sorts of bulbs don't like our eastern US summers, with attendant heat and humidity. I have it in a couple of spots and two of the bulbs flowered again this spring, to my surprise. They are in a bed with Trillium, Sanguinaria, Corydalis of the solida section, Frit. camschatcensis - things that want a cooler, dryer summer but not drought. The bed is in reasonable shade and in winter freezes solid - cold and ice is no problem! I hate to be the merchant of doom but I doubt you'll ever see this one above (or below) ground again. Good luck. J.