By mid-July the heat parks itself in the valley and every lawn in town is quietly deciding whether to hold its color or give up. Summer Green Lawn care plays for the color: cutting high through the hot weeks so roots stay shaded, blades kept sharp so the tips don't brown, feeding and weed control timed to the weather instead of the calendar. Aeration and overseeding come once the nights cool, and cleanups bracket the season at both ends. Little beats the look of a deep green yard in August, when the sun has gone straw-colored on half the block. Ramsey, Allendale, Wyckoff, Ridgewood and Glen Rock.