If you have a railroad hobby store nearby, pick up some Woodland Scenics fine turf. It comes in a plastic bag and a $3 bag will cover quite a lot of space. Go to the links below to see what this looks like.
http://www.armorama.com/modules/photopost/data/500/5911vacav-thumb.jpg
http://www.armorama.com/modules/photopost/data/500/591DSC00026.JPG
http://www.armorama.com/modules/photopost/data/500/5918th_Georgia.jpg
http://www.armorama.com/modules/photopost/data/500/591Al.jpg
http://www.armorama.com/modules/photopost/data/500/591Crow_comp.jpg
All these figures are 54mm or about 1/32 scale. You are likely to be working in 1/35 scale, very close. When you look at grass, you really don't see the individual blades but the overall color and texture.