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