September at Del Mar Park does something particular to Aurora: the little lake goes silver by six, the light lies long across the grass, and every lawn on the surrounding blocks suddenly shows its edges. Nguyen Lawn & Lanscaping Services works that season hard — mowing while the growth still comes, trimming fence lines, and clearing leaves as the ash and locust start dropping in earnest. Through summer it is the steady weekly pass, cut and edged and blown clean, nothing left on the sidewalk. Spring means opening the beds up and hauling off what winter piled in the corners. The pleasure of it is the after picture: a yard handed back quiet and squared away.