Tina - This is a wonderful topic! I have been reading all of this with great interest.
I have a 7 year old bed that I have had the same plain jane yellow blooming daylilies growing and blooming in for all those years. I might add leaves and just a little bit of compost to it annually but really not much at all. This year I noticed they bloomed sparsely. After looking closely at them, I saw that the crowns were quite deep below the surface of the soil line. My initial reaction was "who buried them?" They are not vigorous plants, so dividing them is not the issue. It never occurred to me that the roots would pull them deeper. The ground has been settled in that area for at least 4-5 years. It gets some partial shade during the day, so it is not a "hot" bed like my other garden beds. I was really wondering what was going on. This thread now has me thinking about why the plant roots might pull them deeper.
