I got lilioasphodelus in the fall of 2017 and have it planted in a holding area so I check how quickly it will spread. So far it has not increased much at all. I will be moving it after it blooms this spring. The blooms are extended. A single flower will stay open for 2 to 3 days. It is by far the most fragrant of any daylily I have. Mine is a nice sunny yellow. Its just now starting to put up its leaves.