There is a morning in May when Brewster smells entirely of cut grass, and Milltown Road and every lane off it seem to have gotten the same idea at once. Lopez Brothers Landscaping is out in it early — mowing, string trimming along fences and foundations, cutting crisp edges at walks and beds, and blowing the clippings off the concrete before pulling away. Spring cleanups open a property up after the thaw, mulch goes down, hedges get shaped, and in fall the leaves come off in a long steady push until the turf underneath is green and bare again. Putnam County grass is stubborn stuff, thick where it gets sun, thin under the maples, and it rewards a route that comes back on time. The reward on the other end is small and complete: a yard you want to stand in the middle of.