The Rock River comes down past Milan and gives itself to the Mississippi at the west end of the Quad Cities, and the bottomland it leaves behind grows grass with real enthusiasm. Rock River Lawn & Landscape works those yards in and around South Moline, mowing, trimming, edging, and doing the cleanup that a season of that kind of growth demands. Valley soil and valley rain mean lawns here need less coaxing than keeping up with. The pleasure lies in the finish: an even cut, a defined border, beds cleared of whatever blew into them. Green land beside big water, handled properly.