About the Ordinance
In 2011, Martin County adopted lawn fertilizer controls that restrict phosphorus and nitrogen all year long. Martin County’s strong fertilizer ordinance has served as a model for over 40 other communities along the Indian River Lagoon. Fertilizer restrictions aim to reduce the amount of harmful nutrients entering local water bodies, a crucial step toward improving and maintaining water and habitat quality.
- APPLICATION BAN (June 1 – September 30): Fertilizers containing nitrogen (N) and phosphorus (P) should not be used on landscaping or lawns.
- APPLICATION PERIOD (October 1 – May 30): Fertilizer containing phosphorus (P) is not allowed, and nitrogen (N) must be 50% slow release.
Additionally, vegetative material (including grass clippings), cannot be washed, swept or blown into stormwater drains, water bodies or impervious areas. The ordinance applies to anyone, personal or professional, landscaping in unincorporated Martin County. The fertilizer ordinance includes exceptions for agriculture, golf courses, and athletic fields, as well as for lawns where soil tests have shown a need for phosphorus.