Tenakill Brook runs low behind the back fences of Dumont, and in June the yards along it come up thick and fast. Best Complete Lawn Care keeps to that rhythm — mowing, trimming, edging the walk until the line between grass and concrete is a single clean stroke. There is a particular satisfaction in a Bergen County lot cut on the diagonal, the light catching the turn of every blade. Summer here arrives humid and sudden, the kind that pushes a lawn an inch overnight, and the answer is simply showing up on the day it needs it. By evening the mower is quiet and the street smells like cut grass all the way to the corner.