By late August the yards off Foxhall Avenue are tired, and the difference between a lawn that has been kept and one that has not shows from the car. Jimenez Landscaping and Construction keeps Kingston properties on the near side of that line — mowing on a set week, string trimming, edging along drives and beds, walks blown clean before the crew leaves. Spring opens by clearing out whatever winter left; the fall run takes leaves off in stages as they come down. Where turf has worn thin, seed goes in while the nights are cool. A yard should look finished on Friday and still look right on Sunday.