Late August, the light goes amber over Vine Lake and the crickets start up before the mowers are even unloaded. Evan's Landscape, LLC works Medfield lawns through that long green stretch — weekly mowing, string trimming around fence posts and hydrants, edges cut so the grass stops exactly where it should. Beds get mulched, shrubs shaped, and cleanups take care of the two ends of the season. Turf under Medfield's old canopy trees needs a different touch than the wide-open yards, and it gets one. A lawn finished at dusk, striped and swept, is a small thing that makes a whole street look better.