A plant-trimming apparatus (10) comprises two spaced-apart end plates (14), a rotatable tumbler (18), a rotatable reel (26) comprising a reel shaft (30) and reel blades (28), two bearing blocks (56), each detachably connected to a respective end plate (14) and rotatably supporting a respective end of the reel (26), a motor (42) arranged to drive the reel (26) and the tumbler (18), a bed bar assembly (32) comprising a bed bar (34) and a bed knife (36), the bed knife (36) being in operative engagement with the reel blade (28) for cutting of plant material from the tumbler (18), and a manually-operated locking mechanism operable to secure the bearing blocks (56) and the bed bar assembly (32) to the end plates (14). The apparatus can be easily disassembled for cleaning and re-assembled, without using tools.