a cultivator frame assembly particularly adapted for cultivation of bed - planted crops comprises a parallelogram linkage frame adapted to be attached to a conventional tool bar and a bed cultivator frame carried by the parallelogram linkage frame . the bed cultivator frame provides a series of longitudinally spaced tool bars for mounting the gauge wheel and such cultivating tools as will properly cultivate the multiple crop rows of each bed . the two frames are readily detached so that various forms of the bed cultivator frame may be employed with the common parallelogram linkage frame , as need arises .