September is the honest month for Bergen County turf: nights cool off, the soil is still warm, and grass that struggled through August will take a second chance if you offer it one. Professionally Green LLC works that window in Franklin Lakes — aerating and overseeding, feeding the lawn, and keeping mowing, trimming and edging going while the seed takes hold. Sun is scarce under the borough's tree canopy, so thin spots are a fact of life here and thickening turf is a repeated act rather than a single one. By the following June the difference is visible from the sidewalk. That is a slow kind of result, and the most satisfying kind.