It is reputedly quite sensitive to heat, so I have placed it on the north slope of my rock garden under towering Scots pines where it grows alongside many ferns, primulas and saxifrages. Here's hoping it likes the spot and clumps up. It's progeny, Iris x 'Katharine Hodgkin', quickly forms dense clumps for me!
Here's a closeup of its cousin, Iris danfordiae, from Turkey. Actually, this is the standard form in cultivation which turns out to be triploid, and therefore sterile. I have found it stays quite perennial and reblooms in my garden planted among Fritillaria, Calochortus other iris and a wealth of other bulbs in my blue gramma grass (Bouteloua gracilis) meadow.