Hello, we have a Kwanzan Cherry inside a round retaining wall that is about 5 foot diameter. It is on the front of our house and to the side.

The previous home owners planted 5 Stella daylillys around the border of it and they are miserable without the sun. I think it probably worked when the tree was smaller but now they barely bloom and look dead already.

I have some various hostas and (5) Japanese painted fern and (3) Visions in Pink Astillbe.

Would any of you be willing to help me with a plan to tastefully under the cherry tree? I don't have to use all of the plants because I doubt they would all fit. Your help is greatly appreciated :)