Green Trails winds through Lisle in long loops and cul-de-sacs, and on a June morning the whole neighborhood smells like cut grass and warm asphalt. 3F Landscaping Service works those curving lots the way they ask to be worked, mowing with the bend of the street and edging the walks until the line between turf and concrete is a clean seam. There is real satisfaction in a lawn that looks unhurried, fed and trimmed and holding its color straight through a DuPage County August. The crew reads the season in the grass itself: how fast it comes back after a Tuesday storm, when to raise the deck, when to leave it alone. By evening the mowers are quiet and the yards along the path look like somebody loves them.