“Mow Right” - Proper Mowing Height Field Study

Your participation is needed in a University research project.  The purpose of this study is to measure the adoption of a single lawn care practice: correct mowing height (3 inches or highest setting).  This is the single most critical practice that homeowners need to do correctly to have a healthy lawn. All lawn best management practices hinge on proper mowing.  Many university studies have shown that mowing at 3 inches prevents weed problems, puts less stress on the grass, contributes to a healthy root system, drought resistance, better resistance to insects and diseases, and helps prevent run-off off of soil, fertilizers, chemicals, and pollutants.

This study is a regional effort among participants from University of Maryland Extension, Cornell Cooperative Extension, Penn State Extension, Audubon International and its members, and large and small lawn care companies. It is our goal to achieve widespread adoption of the 3 inch mowing height across the region.

Why mow at 3 inches?

• It has been widely documented that three inches is the ideal mowing height for residential turf across the country. 
• Low and infrequent mowing may be the major cause of lawn deterioration.
• It is best to remove no more than 1/3 of the grass blade each time you mow.
• Mowing to the proper height can reduce weed problems by as much as 50 to 80%.
• Sharpen or replace mower blades at least once a year or more frequently if needed.
• Leave grass clippings on the lawn. It is a way to recycle nutrients.

Register for Study

Participants will be given a mowing guide to set mowing height, a magnet with tips on maintaining your lawn, and participate in brief surveys to document results.

After mowing your lawn, use your mowing guide to measure your current height of cut, then click here to register. Contact information will be kept confidential.

Your participation in the study will result in a sustainable lawn that will contribute to a healthier community.

For Further Information

For information on changing the mowing height on your lawn mower, click here. For more information on mowing, click here.

Thank you for your participation. We will be contacting you with a follow up survey later in the season.