Midsummer over by Filippello Park, the ball fields go quiet in the heat of the afternoon and the yards on the streets running toward the Belmont line want cutting again. JR Landscaping Inc works that stretch of Watertown with a steady weekly turn — grass kept at a height it can survive on, trimming close along walks and fences, clippings and debris cleared off before the crew leaves. Dense neighborhoods reward tidiness more than anything else, and a crisp border along a driveway changes how a whole house reads. Coming back the next week to a lawn still holding its shape is the best kind of confirmation. Lawn care for Watertown and the towns bordering it.