I had a rather unusual situation last year with a dormancy issue. I had purchased a southern grown semievergreen which was in full growth and started blooming when my other daylilies were barely out of the ground. By mid summer, sometime in August, the new plant had completely disappeared and there was a hole in the ground where the plant should have been. I assumed it was dead and in September I went to plant another daylily in that spot only to find that a new growth was being produced. Of course it was underground and I sliced the crown in the process of digging. I'm hoping it survives as it was at the time the most expensive daylily I had ever bought.