A trenching machine having independently driven wheels. Trenching machine comprises digging chain that moves between a raised position and a lowered position, a housing that is carried by a pair of front wheels and a pair of rear casters, a motor that independently drives front wheels to propel housing, and a guide wheel that aligns trenching machine with trench upon a second pass. Trenching machine also has a front plow and a rear plow that collect and deposit the dirt surrounding the trench into the trench. A method of gardening/landscaping wherein a trench is dug by a first pass, soil amendments are added to the trench, and then on the second pass, the excavated dirt is plowed back into the trench and then mixed with the amendments. A method of gardening/landscaping wherein vegetation cover between trenched rows is maintained thus utilizing only the ground area that is needed for planting.