Spring in Lilburn arrives yellow. Pine pollen films the cars, the porches and every blade of grass in the subdivisions off Lawrenceville Highway, and then one good rain washes it into the gutters and the growing starts in earnest. Yarden Ops LLC meets that first surge with aeration and overseeding, fertilization and weed control, plus the opening cut of the year — the one that takes a shaggy, dormant lawn and hands it back its shape. After that it settles into a loop: mow, edge, trim, blow, move on, return next week. Lilburn and the towns beside it run on that same schedule, and the schedule is most of the trick.