A vegetation trimmer comprising an elongate main handle to which is connected a motor that rotatably drives a trimmer head located at a distal end of the handle. The trimmer head defines a rotational axis and includes a housing and a spool rotatably received in the housing for carrying at least one coil of flexible trimmer line. The trimmer head further includes structure for enabling trimmer line to be wound through housing and onto the spool in a user-selected clockwise or counterclockwise direction without removing the spool from the housing such that trimmer line is dischargeable from the trimmer head in an appropriate clockwise or counterclockwise direction dictated by the direction of rotation of the vegetation trimmer drive shaft.
