The construction of a bush in three stages.
Prepare the base
If you are using a thicker base material than mounting board, like the
hardboard shown here, then you will need to chamfer the edges off with
Paint the base with watered down PVA and sprinkle with sand.
You should then apply a base coat to the base, or you will end up with
unpainted areas visible through the bush
Glue the horsehair to the base with PVA. You can divide it up
by just tearing it apart with your fingers. Use quite large blobs of
glue, or the bush won't attach properly.
Cover the bush with flock You can attach the flock with PVA,
or alternatively paint the bush with a dark brown emulsion and sprinkle
on the flock while it is still wet.
Finish off base
You can now apply your standard basing technique to the edges of the
base and add the odd details such as rocks or long grass as shown here.