The C line runs its own green ribbon down the middle of Beacon Street — grass, rail, grass — all the way out toward Cleveland Circle. PrimeLine Landscaping works the blocks off either side of it, cutting, trimming, and edging the front strips that face that long straight view. Edges are the whole argument: a clean border between lawn and sidewalk turns an ordinary yard into something composed. Spring comes late to Brookline and then all at once, and by the first warm Saturday the mowers are out and the season is on. Straight lines, swept walks, everything squared to the street — that is the look worth chasing here.