Maryland has passed a law that will reduce pollution from lawn fertilizer applied to homes, golf courses and businesses.

The Chesapeake Bay Commission, whose members introduced the legislation, estimates that the Fertilizer Use Act of 2011 will reduce phosphorus pollution from urban sources by 15 percent compared to 2009 levels. This equates to 20 percent of the phosphorus reduction Maryland needs to achieve its pollution reduction goals for the Chesapeake Bay TMDL.

Turf grass is now the largest “crop” in the Chesapeake Bay watershed, exceeding the amount of acres planted in corn and fast approaching all row crops combined. As the amount of lawns in the region increases, so does fertilizer use.

The legislation limits the amount of nutrients in fertilizer used by homeowners and lawn care professionals. Nitrogen will be limited and phosphorus will be banned in most types of lawn fertilizer.

Additionally, professional fertilizer applicators will have to be trained and certified in proper fertilizer application, such as keeping fertilizer off paved surfaces and not applying before heavy rain or when the ground is frozen. Areas along waterways, drainage ditches and near storm drains will be designated as “no-fertilizer zones.” (Read a full list of the lawn fertilizer bill provisions.)

The commission worked with soil scientists, environmental groups, fertilizer manufacturers, the Maryland Department of Agriculture, and associations representing lawn care professionals and golf courses to develop the provisions. Similar legislation passed in Virginia this winter, and is expected to be introduced in Pennsylvania this year.

Calling this bill “one of the nation’s most comprehensive and protective standards for lawn fertilizer content and use,” Chris Wible, director of environmental stewardship for the Scotts Miracle-Gro Company, pledged to work with Bay groups to teach homeowners about protecting the Bay from their own backyards.

Another important part of the legislation is increasing and improving homeowner outreach. Within one year, the Maryland Department of Agriculture and the University of Maryland will develop and distribute consumer guidelines to help homeowners better understand how to reduce pollution from lawn fertilizer.

For more information about the lawn fertilizer legislation, visit the Chesapeake Bay Commission's website or read the Maryland General Assembly’s bill summary.

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