August on Summit Avenue is all deep shade and slow air, the privet hedges gone rangy and the lawns beneath them thin where sun never lands. It takes a careful mow to keep that kind of yard honest — height raised, passes overlapped, edges cut sharp along the walk so the whole thing reads as intentional. JLC. Landscaping L.L.C works those blocks through the growing season, trimming close to fences and foundations and blowing the clippings off the concrete before pulling away. Cleanups in spring and fall clear out what the wind piles into the corners of a Hackensack property. It is ordinary work, and a good lawn is the plainest proof of it.