I grow most of my named daylilies in a very boggy area. I am constantly striving to improve the soil structure and drainage, more for my sake I often think than for the plants. Working hours at a time in a muddy bog is very messy! I think I have made a lot of progress over the years hauling in organic matter, but I still have years ahead of me to continue to haul in organic matter and rework the bog beds. The leaves and grass clippings are more than several feet deep in many areas, yet the water is still standing in many spots. Of course, the organic matter turns into "soil" pretty quickly with the help of thousands of earthworms, so I end up with some very nice muddy soil.The plants seem to enjoy it. Rot has not been a serious problem, but I do still worry about it even after several years of growing, I do occasionally lose a plant, but am never sure of the reason.
I am constantly amazed at how much organic matter it seems to take to add just an inch of extra "soil" to the bog.