An apparatus for grooming surfaces includes a generally horizontally oriented skeletal primary frame; an ground support assembly for supporting the apparatus for movement over a surface; a tine support assembly movably mounted to the primary frame; an array of tines mounted to the tine support assembly and projecting generally downwardly a predetermined distance there from; and an apparatus for imparting controlled substantially vertical motion to the tines for adjusting a depth of surface penetration by the array of tines.