Many many years ago, I had bought two Woodland Scenics landscaping kits from Hobby Lobby. I finally dusted off the boxes and was surprised that the Scenic Cement (watered down glue) was still OK to use!
I found one medium pouch of "Green Blended Turf" and smaller pouches of "Burnt Grass Fine Turf," "Green Grass Fine Turf" and "Medium Green Coarse Turf," all of which I mixed together in a zip-lock bag to get enough material to flock the lawn.
At this time, I am adding a lawn around the house, but leaving the courtyard empty. I am still not sure what I want to do for the courtyard.
I painted the wooden base with a coat of sap green acrylic paint.
You can use Scenic Cement to glue the grass on, or you can simply use watered down white glue. I have used both during my project, and got the same result.
If you are watering down glue, make sure it is not so watery that it will not hold down the grass after it dries. It will be the consistency of full-cream milk, and slightly slimy from the glue.
I poured the flocking material into a disposable bowl, and mixed it with the glue so it looked like avocado dip.
I took clumps of the mixture, and patted them down to create a thin layer of grass on the base.
I mixed small batches so that the mixture would not dry out while I worked, but the process went quite fast for me.
This is the first time that I ever flocked dollhouse lawn, and I was pleasantly surprised at how easy it was.