Making fake but realistic-looking grass is one key to building a lifelike diorama. Below are two methods for making artificial grass that you can choose depending of your needs and the materials you already have. You can purchase most of the needed materials at a craft or grocery store and can even use some office equipment.
Run green construction paper through a paper shredder.
If your paper shredder does not cross cut the paper, cut the shredded paper to the desired length of your grass.
Crinkle the strands in your fist so that they will stand up in your diorama.
Spread glue on your diorama and sprinkle the green shredded paper over it.
Put 1 cup of shredded coconut into a bowl.
Mix eight drops of green food colouring and two drops of yellow food colouring with the shredded coconut.
Add more green food colouring if you would like the grass to be darker.
Spread glue on your diorama and sprinkle the green shredded coconut over it.
Use care when using food colouring as it can stain your clothes and skin.