What is the white piece of paper on the foam? It's cut out as the shape of the structure so that when it is removed the structure will "nestle down" on the foam rather than sitting on top of the static grass. If I don't do this I have to end up scraping away the static grass in the area of the house after it's dried and that's a pain.
I used my homemade "Grass-O-Matic" static grass applicator to first add a layer of 2mm (6" HO scale) long "late summer green" using a 50/50 mix of white glue/water.
I went back and added here and there a mix of 2/4/6mm static grass of various colors to add some different texture. I then took a screwdriver and randomly pressed down the grass all over to give it a more realistic look.
Boy, am I tempted to put Grandpa's house on the diorama right away! Not a good idea as it will get glue on the bottom. I guess I'll just have to be patient and wait for the glue to dry. Once the glue is dry I'll place the house on the diorama for the balance of landscaping.