I am still mowing my flipping lawn fortnightly, and at work we are still cutting lawns weekly! As Tim said, the good thing about mowing in my garden is the leaves are hoovered up at the same time. Last winter I had to mow several times - if I leave our grass to long, when we have rain it becomes incredibly waterlogged and you can hear the water trickling through it. By keeping it short, the air can circulate and the sun can reach through and dry it out quicker.