Needs ALOT more detail, and the dirt path is straight... in most cases, with nature, you should never have a straight dirt path, nature is chaotic and things hardly ever "go straight" if you know what I mean. Also, the way you placed the two weeds on either side (4 altogether) isn't nature-looking either, both weeds on the left side are exactly 1 tile down from the weeds on the right side, not good. You need alot of work, there should be a Map Screenshot thread somewhere around here you can post your work there for more critique.
Did you edit the tileset at all? It doesn't look right, it might even be your screen tone... just too gray. If its supposed to be night/dusk, you should change the screen tone and saturate it with blue. Also, if you did edit the tileset, your grass looks bad. Its all tile-y, you need to break the grid by adding more detail.