Abstract: A portable leaf grinding device (PLGD 10) that is used to grind a substance such as a plurality of compacted leaves into a multiplicity of leaf particles. The PLGD (10) consists of a circular cap (12), a cone-shaped hollow structure (84) that is releaseably attached to the cap (12), and a container (102) that is also attached to the cap (12). The circular cap (12) has attached an upper grinding disk (42) having a plurality of downward-extending leaf grinding blades (58). The upper grinding disk (42) interacts with a lower grinding disk (62) which is attached to the structure (84) and which also includes a plurality of upward-extending grinding blades (72) and a plurality of bores (74). When the circular cap (12) is rotated, the blades on the two grinding disks (46,62) interact with each other to produce the multiplicity leaf particles. The leaf particles can be either stored in the container (102) for later use or used immediately as they exit from the structure (84).