Well...we never got this cold before. My daylilies that are in pots are fine (except for the ones that rotted), but Michele's sank. I was rotating mine with the ones on the steel shelf and the ones on the picnic table so they could dry out between rain storms. I was playing musical pots all winter. LOL. I do not know why my new bed sank but I will just dig them up and add more soil one at a time, it will give me a chance to add more alfalfa and milorganite. Can you think of anything else? They are in a place where they should grow rapidly, they will get over six hours of morning sun till it goes behind the house, that was one reason for planting them there next to the road. LOL.