Your main job in fall is to keep your lawn free of leaves and other debris. You can use a mulching mower to break up leaves and add the organic matter to your soil, but be sure to clean up any clumps so they don’t kill the grass.
In the northern one-third of the country, now is the time to fertilize your lawn. Your grass will store the nutrients in its roots as it goes dormant over the winter, and your lawn will be ready for a jump start when spring warms the ground.
This is also the time to clean up your garden.