Couple things, the build looks good overall.
Like the others said, the lichen distracts. If that's snow on the ground, leave teh trees bare. Hudson and Allen (among others) have very good forest debris. If you want an autu\mn look to the trees, look for a product called Foliage by Woodland Scenics. It comes in several "seasons" and there are several shades in each packages. It can be draped more smoothly and will look more like, well, foliage! I'd also cut the grass down to about half that height at the most. These are the steppes of Russia, not the jungle
. By folding a bunch over, and tying the folded part tightly, you can create nice clumps of grass.
When taking a photo, try to simplify the background. Use a towel drapped over a box or pick up a piece of cloth remnant at a fabric store and elimnate the excess. Also, you can use your photo editing prgram to crop out a lot of the background or even selctively fuzz out or "paint" over the stuff that's not part of your dio.