grass is way too large scale, but it's still pretty nice work.

Nice! I think the shrubs need more contrast, though. Some dark shadows around the base of the leaves would help bring it out.

I agree, it looks like a shrub or plant rather than grass, especially compared to the size of the fence.

Love the earth/mud texture and the metal fence with barbed wire. overall...cool tiles.

Cool!  I like this a lot for some reason.

 I really like the monochromatic nature of this piece - the palette works well.  I think the grass looks more like aloe vera than it does grass.  Try creating some thinner strands and not worrying about having to outline all the blades.  Will the grass also go closer to the edge of the tiles?

 I'm not sure if you're going for this or not, but the entire piece is rather monochromatic. The grass... yeah, it's a bit too sparse for one thing, and the individual blades seem rather thick and rigid, almost like cucumbers. But I really like the texture of the ground, and the fence is really cool. =)