August in Nashua can go three weeks without real rain, and you can watch the lawns on the terraces above the Merrimack fade from green toward straw. NorthShire Landscaping & Irrigation keeps after that turf through the heat — mowing on a schedule, trimming and edging, cleanups when spring opens up and again once the leaves are down. Then the year turns and the same properties need plowing, shoveled walkways and open lots at whatever hour the storm decides on. Nashua sits at the center of the map, with Hudson, Merrimack, Litchfield and Hollis around it. Summer or winter, the work is about a place being usable and looking it.