The ground under Berlin Township is sandy and quick — a hard rain sinks straight through it and leaves the roots wanting more again by Thursday. That is the puzzle Green Side Up Lawn Fertilization works on: feeding turf on soil that holds very little, so a lawn can carry its color into the deep heat of July. The work is lawn fertilization and seasonal feeding alongside mowing, edging and general lawn maintenance, timed to what the grass is actually doing that particular week. Late April is the finest stretch of the year for it, when mornings stay cool and everything in the yard is reaching at once. A thick, even stand of grass is quiet proof, and it shows up months after the visit that made it.