Coyote Moon is also consistently hardy to zone 3. It's perhaps not quite the full 28-inches it is listed for, but still stays above 2-feet. Is it just my gardens, or do polymerous blooms love colder climates? Along with many other daylilies here, Coyote Moon puts out poly blooms.
It's reliable and blooms consistently, hardy in cold climates, and really a very pretty (though small) flower. It has a very good bud count.