I have a slope that is 60 ft. long by 6 ft. Very steep, be hard to walk up it with out sliding down. Customer wants something planted on it. It is full sun. My options are creeping phloyx, Tri-color sedum, periwinkle, mondo grass, daylilly and dianthus creeping type. I can get them in a 4 inch pot for cheap. I plan on spraying the grass on bank. Planting spaced about 2 ft. That should be about 180 plants. I thought about using that erosion matting with a thin layer of cypress all bark on top. Any thoughts?