Abstract: Dual arm mechanical pruning apparatuses for simultaneously hedging and/or skirting trees in adjacent rows typically comprising: a mast assembly; a lift carriage assembly; two front arm assemblies, each front arm assembly comprising one or more saw blades; two lower arm assemblies, each lower arm assembly comprising one or more saw blades; two swing arms, each swing arm rotatably attached to the lift carriage, one of the two front arm assemblies and one of the two lower arm assemblies, where the two swing arms rotate, thereby extending and retracting the two front arm assemblies and the two lower arm assemblies relative to the lift carriage assembly, and where the two front arm assemblies hedge, and the two lower arm assemblies hedge or skirt trees. In some embodiments the dual arm mechanical pruning apparatus also comprises a vehicle mounting assembly.