A dull blade tears grass instead of cutting it, and the lawn tells on you by Thursday — browned tips, ragged color, the whole week's work undone. Cannon Blades LLC takes that personally on the Bergen Street blocks, where July noon is merciless and a clean cut is the difference between a lawn that holds and one that scorches. Mow at height, trim close to the posts and stoops, open the sidewalk seam with the edger, blow the clippings back off the concrete — the routine barely varies, and that is exactly the point. Newark lots are compact enough that every shortcut is visible from the porch. So nothing gets hurried, and the lines run true right into the corner of the yard.