I used to grow daylilies in raised beds. They did not have any wood or anything around them. I had the whole bed tilled, then shoveled the soil from where I wanted aisles onto the bed area. They ended up being several inches above the paths after they settled in. After I cut way back on what I was growing, a friend dug up all my plants for me, and the neighbor re-tilled the bed. We added some new amendments, then made beds the same way. Then, we replanted all the daylilies. That was several years ago, and the beds are still a few inches above the paths.