Federal Hill stands over Riverdale with its rock face and scrub oak, and by mid-October the whole rise has gone rust and copper. Black Bear Landscaping works the ground below it — mowing and trimming while the grass still moves, edging the walks, then taking on the long leaf work autumn hands out around here. Spring brings the cleanup, the first cut of the year and mulch into the beds. Borough soil runs thin and stony in places, so aeration and overseeding go where a lawn keeps losing ground. Done right, the yard reads as one green piece from the curb to the tree line.