By September the meadows along the Passaic below Gillette start going gold at the margins, and the lawns that fought through August are finally ready to be brought back. That is the season Triple T Lawn Rehab lives for — cores pulled, seed worked into the openings, fertilizer timed to the cooling nights. Weeds get taken out of the way first so the new grass has room, and mowing height comes up while roots do their quiet work underground. By the time the Watchung slopes turn color, the thin patches have knit shut and the whole yard reads one shade. Spring will show it again, thicker than the year before.