Fertilizer Rules to Help Protect Biscayne Bay
Published on May 27, 2026
Miami-Dade County’s Florida-Friendly Fertilizer Use on Urban Landscapes Ordinance was adopted in April 2021 to help reduce nutrient pollution and protect local waterways, including the health of Biscayne Bay.
While fertilizer plays an important role in maintaining healthy lawns and landscaping, excess nutrients such as nitrogen and phosphorus can wash into canals, lakes, wetlands, and the Bay — contributing to algal blooms, poor water quality, and seagrass die-offs.
Residents and landscaping professionals can help protect our environment by following these important fertilizer guidelines:
- No nitrogen or phosphorus fertilizer may be applied during the summer rainy season from May 15 through October 31. During this time, heavy rainfall increases the likelihood that nutrients will wash into storm drains and waterways.
- Fertilizer application is prohibited near water bodies such as canals, lakes, wetlands, and Biscayne Bay.
- Phosphorus-containing fertilizers may only be used if a soil test confirms a phosphorus deficiency.
- Nitrogen application rates and slow-release requirements are limited to the amounts specified in the ordinance.
- Grass clippings and yard debris should be properly managed to prevent them from entering streets, sidewalks, storm drains, or waterways.
- Landscape professionals who apply fertilizer as part of their job are encouraged to complete best management practices training to help protect water resources.
These regulations apply throughout Miami-Dade County, including within municipalities. Residents should also check with their local municipality for any additional restrictions or requirements.
The ordinance does not apply to bona fide farm operations, livestock grazing pastures, and certain athletic fields. Some portions of the ordinance may still apply to food gardens and golf courses.
By following these guidelines, residents can play an important role in protecting Biscayne Bay and preserving Miami-Dade County’s natural environment for future generations.
For additional information or questions regarding the ordinance, contact the Miami-Dade County Department of Environmental Resources Management (DERM) at DERM@miamidade.gov.