In the flats below the hill the lots are narrow, the fences are old, and the back gardens have been tended a long while — the kind of yards where every square foot of grass has a purpose. DeLorenzo Landscaping works them close: mowing between the beds, trimming along the fence line and the garage slab, edging the strip of walk that runs out to the alley gate. April opens the season with a cleanup, and the end of November closes it once the leaves are down and gathered. Then the plow goes on and those same driveways get cut narrow and clean, walks salted out to the sidewalk. A Schenectady block is an easier place to live when someone knows it in both seasons.