Thinking about a robot mower? Map your lawn free at ZippyLawnz.us. It takes about two minutes, and we'll recommend the right robotic mower for your yard. Fall is the best time of year to overseed a lawn in the Mid-Atlantic. If you own a robot mower, it can do a lot of the prep work for you. You just need to change a few settings and give the new grass room to grow. Here's the exact process I'm using on my own lawn this fall, with the robot mower settings for each stage. Why o