September in Flatbush: the light tips over, the mornings cool, and the grass finally slows down. Lahwah Landscaping is out for the season's steady work, mowing, edging, trimming shrubs, weeding and mulching the beds, then the fall clearing that carries the year's leaves away. Between the fenced front yards and the deep back lots, this stretch of Brooklyn holds far more green than people expect, and all of it wants hands. Seeding and feeding now is what makes an April lawn look effortless. The last cut of the year is a quiet, tidy pleasure.