I use WhiteMagus' Realistic Grass from Rendo when I need a real grass in a render. It's actually very useful (and currently on sale for just over $5.00) and looks great in renders. Here, I just used one of the small props on top of Seachnasaigh's Weedy Grass for the P11 Construct. I did change the specular on the grass because he has it set for white which is fine for Firefly, but not Superfly. I just changed the color to a dark green on the Specular.
I also did a quick render here and didn't let it run as long as I normally would in Superfly.