Spring mornings in Pine Brook start under a low ceiling of fog off Troy Meadows, and it burns away just about the time the first mower pulls. BP LANDSCAPE & DESIGN keeps lawns across these streets on a steady rhythm of mowing, edging and string trimming, with cleanups when the seasons hand over. The ground here is river-bottom flat and generous, so growth comes fast and a schedule is the only thing that stays ahead of it. There is a particular satisfaction in the last pass of the day, when the stripes line up and the border along the walk reads like a drawn line. Pine Brook is a place of quiet blocks set between marsh and highway, and a tended lawn is how a house says it is paying attention.