Since we have had lots and lots of rain in just few days, I decided to try the suggestions of 'greene, AnnC and CindiKC' above to help rid my hopeless daylily bed of grass, grass and more grass. The soil was very wet. I was able to pull handfuls of grass, including long roots. The north end of the 20' bed is now clear of grass and I am amazed at how easy the job has been so far. When my body recovers a bit, I look forward to tackling the other end of the bed.
I had virtually given up on this bed and had begun to give away clumps of day lilies to friends. Now, thanks to ATP friends, I will get to see the beautiful day lilies again next year!