Little project im slowly working on if i got time 
Looks great so far. I would recommend that you add a bump map to the rocks and the stone walls as they look a little smooth.
What is this rendered in btw.
That looks pretty nice! My dream for when I’m experienced enough in Blender is to fully create the view from my grandparents’ lake house…I’d say you should work a little on the rocks, there should be flat areas or dips in the rock filled with dirt where the grass is growing, and overall it doesn’t quite look “jagged” enough, but otherwise, a great start!