Hi everyone, I've grown a couple of the cultivars of this species, notably 'Mary Barnard' for the past fifteen years in the open garden, which is in one of the colder areas of England. Here it often flowers in mild periods during the winter. For example, its in full flower this week, even though there were light frosts here ten days ago. I also grow a form of Iris unguicularis subsp. cretensis (sometimes known as I. cretensis or I. cretica or even I. unguicularis 'Cretensis' nobody, including Brian Mathew, seems to know which might be "correct"). This is a charming miniature, collected by the late Jack Elliot, in Crete: it grows there and in the Peloponese. It stand no more than five inches tall and has white and yellow flowers. However, it seems less hardy than the main species, so I cover mine over in the winter. Best regards, David Victor