Late summer on the Berlin Turnpike, the traffic runs hot and straight while the side streets behind it stay green and shaded all afternoon. A-Z Services LLC works those streets with lawncare and landscaping, setting seasonal color and perennials so a yard has something to say in whatever month somebody happens to look at it. They create yard designs and build out outdoor living space, then keep the whole thing going with maintenance rather than one showy afternoon. The shop sits on Grassmere Ave in West Hartford, an easy run over to Newington and the towns packed in tight around it. It is plain work kept up week by week — beds edged, plants put where they will thrive, a yard that finally feels finished.