Grasscycling is a method of handling grass clippings by leaving them to decompose on the lawn when mowing. The term combines "grass" and "recycling", and had come into use by at least 1990 as part of the push to reduce the huge quantities of clippings going into landfills, up to half of some cities' summertime waste flow, as 1,000 square feet (93 m2) of lawn can produce 200 to 500 pounds (90 to 225 kg) of clippings a year.
Because grass consists largely of water (80% or more), contains little lignin, and has high nitrogen content, grass clippings easily break down during an aerobic process  (comparable to composting) and returns the decomposed clippings to the soil within one to two weeks, acting primarily as a fertilizer supplement and, to a much smaller degree, a mulch. Grasscycling can provide 15 to 20% or more of a lawn's yearly nitrogen requirements. Proponents also note that grasscycling reduces the use of plastic bags for collecting yard waste and reduces trips to the curb or landfill to haul waste.
- Cutting no more than 1/3 the length of the grass, this means when lawns are growing fast, mowing about twice a week.
- Cutting when the grass is dry to the touch
- Cutting when the height is between 3 and 4 inches (7 to 10 cm), once per week.
- Ensuring that the mower blade is sharp
Although a mulching mower can make grass clippings smaller, one is not necessary for grasscycling.
- "Grasscycling definition/etymology". Retrieved 2007-05-25.
- "Denver Recycle Grasscycle". Archived from the original on 2010-09-05. Retrieved 2007-05-25.
- "Rivanna Solid Waste Authority Grasscycling Info". Archived from the original on 2007-09-30. Retrieved 2007-05-25.
- "Grasscycling FAQ". Archived from the original on 2009-11-28. Retrieved 2007-05-25.
- Scoville, Heather. "Aerobic vs. Anaerobic Processes". About Education. About.com. Retrieved April 17, 2015.
- "Grasscycle!". Archived from the original on 2012-02-16. Retrieved 2007-05-25.
- "California Integrated Waste Management Board - What is grasscycling?". Archived from the original on 2009-12-21. Retrieved 2007-05-25.
- "King County Experience: Grasscycling". Archived from the original on 1999-11-05. Retrieved 2007-05-25.
- "Bay Delta Grass Recycling Campaign". Archived from the original on 2012-02-12. Retrieved 2007-05-25.
- "How Often Should You Mow Your Lawn? - For Dummies". www.dummies.com. Retrieved 2016-02-29.