September in Gwinnett is when a lawn's real condition shows: the Bermuda begins easing off, and the shaded fescue yards decide whether they made it through the summer. RT Turf Care LLC works that window across Snellville — core aeration to open compacted ground, overseeding where the stand has thinned, then back to the regular mowing, edging and trimming. Cool nights and warm afternoons do the rest, and by late fall the thin spots have closed. Turf that gets attention in September is a different animal come March. Lawn and turf care in Snellville and the surrounding towns.