Interesting, Chuck. Starting from a single fan can sometimes be difficult. I got mine also in 2018, but it was around four fans. I have divided already, and it needs division again. I have had some things that took forever to establish from single fans. Warmer than you, but little snow cover, winter temps to zero, and lots of freeze/thaw. I see from the database that someone else in 5A had some problems. We will see what happens after this harsh winter, but so far, none of the signs of winter tenderness--short scapes, low bud count.