March in the Fowl Meadow: fog lifts off the Neponset flats at first light, the last gray snow gives up along the fence lines, and Milton starts looking for its lawn again. GreenOp meets it there — raking winter out, mowing the first flush of growth, trimming and edging until the yards read crisp instead of shaggy. Months later the same crew is out at two in the morning with the blade down, cutting driveways open on streets that pitch toward the river. Snow is measured in hours and grass is measured in weeks; both reward whoever shows up on time.