On the residential side of Southfield the streets run under old maples, and the brick ranch houses sit back behind lawns that have been kept the same shape for a long time. GARCIA'S OUTDOOR MAINTENANCE INC. carries that on — weekly mowing, string trimming, a crisp edge along the sidewalk, beds weeded and mulched, leaves gathered when the maples let go all at once in November. Timing beats muscle on this ground; the clay is soaked in April and hard by the middle of August. The best part of the job is the look back from the curb: straight lines, the walk squared off, not a clipping left in the street. Lathrup Village, Oak Park and Berkley are all a few blocks away, and the work travels.