Thanks everyone for the kind remarks.
I have done more work on this section and will show it now.
I put ground cover in shakers that were formerly for grated cheese. The best part was eating all of that spaghetti. I sprayed detergent water on the rocks, and then brushed a white glue and water solution onto it.

Next, I sprinkled three colors of gound cover on some cardboard. Then, I blew it into the rocks. This is better than just sprinkling directly onto the rocks because too much ground cover drops of the rocks.

The third photo shows the final result. I waited for the glue to dry. Then, if there was too much ground on any of the rocks, I gently rubbed it off with a dry cloth. Also, you will see I added more scenery such as trees to the scene.