Please excuse the railway
pictures as I have used these methods for model railway as well. Some more
suitable pictures will be coming soon.
Method 1: Grass imitating felt. this
stuff comes in sheets of 1m squared and is cut to fit and glued down. It has
the feel of coarse fir. This stuff is not cheep but allows you to cover a
large area quickly with no mess. it is also more resilient than using
scatterings. This is what I used.
Grass cut, and glued in to place.
Method 2: Scatterings. They
come in all shapes sizes and colours including grass. First you spread glue
over the area you want to cover. Use a lot of glue as this stuff often falls
of if you don't. Then spread the scatterings over the glue. It is a good
idea to use a sieve to control the amount you use and/or a brush to move it
in to all the gaps. Neither are essential but are useful. Once dried use a
clean dustpan and brush to collect all the lose scatterings so they can be
re used. Don't use a hover as this can pull of a lot of the glued down
material. It is my advise to paint the board under the scattering the
desired colour so that any fall of due to ware and tare will not show