Fall is for planting ... ground cover plants

A dense planting of ajuga covers the area around this tree

A dense planting of ajuga covers the area around this tree

Here is a terrific site if you need to learn about using ground covers. It may be a little too late this year for your plants to get super-dense, but we love it when our pachysandra hides all the fallen leaves! 

Thanks to the University of Illinois for all of this great info. http://urbanext.illinois.edu/groundcovers/about.cfm