[lengthao]

When do you stop cuting grass

[wildandblue]

Grass stops growing usually after first hard frost or when temps fall into the 40's. Usually you give it one last mowing after a killing frost to neaten things up, or you can still run over it with the blade set high to mulch your leaves.

[Patriarch]

Also stop mowing when the grass stops growing. This is normally when it goes dormant in mid to late fall for winter.