Not yet, but they're at the top of my list to order in the fall. From what I have been able to discover in researching the plant, the leaves will not stand throughout the growing season, but will go dormant. Sounds like a good plant to put among late emerging or spreading perennials. I will be anxious to hear what other responses you get.

I have one. I forget where I planted it except I remember which bed it's in. It's interesting. The leaves do retreat and the plant vanishes to return the following spring.

I have a grouping of a dozen or so. It is the only allium I know that manages to maintain decent foliage - most of the others I have grown over the years will produce big, showy flowers but by that time, the foliage has deteriorated to c#*p just when the plants are the most noticeable.

These are not very tall bulbs, so best planted in the front of the border or in a rock garden (even better) where they are very noticeable. In my area, the foliage appears quite early - March - and is very attractive in its own right with heavy veining and a purple underside. Flowers appear late April to May and last for several weeks. A very good showing bulb and reliably perennial. Full sun and good drainage.