It’s possible to over-mulch leaves. If the leaf mulch is thick enough that it’s blocking and smothering the grass, that’s a problem. Ideally, you should still be able to see the grass when you’re done mulching to ensure its ability to continue growing. The solution is to make another pass at the top layer of leaf mulch to collect some of the top layer.

The least strenuous methods to get rid of leaves are to use a leaf blower, leaf vacuum, or a lawn mower, since these machines will do most of the work. 

Always remove leaves from hardscapes and other lawn features. Leaves and other yard debris can become slippery and dangerous, and fallen leaves can discolor and stain materials like stone, brick, and concrete. Use a rake, brush, or leaf blower to remove leaves from hardscapes and prevent staining.

The best way to clean an overgrown yard is to create a multi-stage game plan, from clearing out the debris to cleaning up the edges around hardscaping and landscape curbing. Get rid of yard debris like worn furniture and broken tools first, then start trimming and raking what’s left. Mow the grass, trim the hedges, and rake leaves away. Once that’s complete, move on to more detailed work, like pulling weeds and replanting gardens.