Ideally, the area to be mulched should be weeded and cleaned up first, which will improve the pest and weed-blocking properties of the grass mulch. Apply a thin layer of grass mulch the first day, and then more can be slowly added over time. Continue this weeding first, mulching second routine throughout the season for best results.
Once the weather turns cooler, grass mulch can be incorporated directly into the soil in preparation for the following spring. Homeowners can use grass mulch to prepare the area where they plan to expand their garden the next year. Grass mulch adds nitrogen and can be balanced with things like sawdust or dried leaves that add carbon. Mixing all of these items into soil about eight inches deep will help feed the area. By the following spring, these items will have formed a nutrient dense spot to add new plants.
Another great use for grass mulch is to help homeowners begin a home compost pile. Grass mulch can be alternated with brown materials to help start a compost pile that will put kitchen scraps and garden waste to good use. Finished compost can be used generously throughout a garden.
The best grass mulch will contain a variety of grasses, which can help vary the texture of the mulch as well as the nutritional value. Grass mulch may also attract beneficial wildlife to a homeowner's garden.