Focus is pretty good and so is the depth. Nice fog and tree elements.
For me though the composition needs to improve. The building right bottom kind of intrudes and distracts. And you have fog but it is not well used because there is too much emphasis on the tree because it is too large in the picture.
I think shift back a bit to make tree smaller, shift to right to get the building out of the picture and capture the fog above the grass and it would be much better.
Mostly agree with Scott. Also, how about a slightly different position (farther away, longer lens) with the tree smaller and the building more visible, as a counterpoint to the tree?
Agree with Scott that the tree is too large in the picture.
And I agree with Carlo about moving farther away and using a longer lens to maybe shorten the distance between tree and building. All the better if the building is old and rickety, but it looks like it has a painted white door, which might ruin the effect.
Also, the grasses in the foreground look interesting, like if they had a touch of sunlight on them (amidst the fog, of course) they might reveal a bit of color.
There's a white tuft of seed or something smack dab in the middle of the foreground which could be cloned out.
