When can I stop mowing the lawn in the fall?
Continue to mow the lawn until the grass stops growing in the fall. The foliage of cool-season grasses, such as Kentucky bluegrass, stops growing when daytime high temperatures are consistently below 50 degrees Fahrenheit. In central Iowa, bluegrass usually stops growing in early to mid-November. Once the foliage stops growing, the lawn mower can be put away for the winter.