Sharpening the blades on a Troy-Bilt push mower is essential for maintaining optimal cutting performance and ensuring the health of your lawn. Generally, it is recommended to sharpen the mower blades at least once per mowing season. However, this frequency can vary based on how often the mower is used and the conditions in which it operates. If you mow frequently or encounter tough terrain or sandy soil, you may need to sharpen the blades more often, possibly every four to six weeks. Additionally, if you notice that the mower is tearing rather than cutting the grass cleanly, it is a good indication that the blades need sharpening. Regular maintenance of the blades not only enhances the mower's efficiency but also promotes a healthier lawn. For specific instructions and maintenance tips, individuals may want to check the current resources available on the official Troy-Bilt website.