July in east Boulder is dry heat and long light, the kind of afternoon where sprinklers come on at dusk and the lawns out by Twin Lakes hold the smell of cut grass until dark. Guerrero Landscaping mows and trims straight through it, keeping blades sharp and the cut high so the turf can carry moisture through the hottest stretch. Edges along walks and driveways get defined once and then held there, and the beds are cleared in spring and cleaned again when the cottonwoods let go. Aeration and overseeding wait for the nights to cool, which is when the ground is finally willing. The finished yard is simple and unmistakable: even color, straight lines, nothing left behind on the concrete.