Be Fertilizer-Free for Manatees

Nutrient pollution in Florida’s waterways is a critical problem, fueling repeated harmful algal blooms in coastal waters. In the Indian River Lagoon, a critical manatee habitat, such harmful algal blooms have destroyed native seagrass, resulting in the deaths by starvation of hundreds of manatees. In 2023, there were over 550 recorded manatee deaths in Florida, on top of the record number recorded in 2021 of 1,101, followed by 800 recorded manatee deaths in 2022. The situation remains dire because human caused nutrient pollution remains much too high.

Together, we can protect these critical habitats for manatees, other aquatic life, and for our own future generations by reducing human sources of pollution such as fertilizers, improperly-treated sewage, leaking septic systems, and stormwater runoff. While Save the Manatee Club works with our partners to strengthen policies that protect water quality, the individual actions of each Florida resident can make a big difference for the health of our waterways. Do your part: take the pledge to be Fertilizer-Free for Manatees!

Take the Pledge!

I pledge to be Fertilizer-Free for Manatees by:

  • Avoiding fertilizer use on my lawn and landscape
  • Conserving water by irrigating my lawn only when necessary
  • Keeping grass clippings out of streets, waterbodies, and swales
  • Learning about Florida-Friendly Landscaping to protect waterways
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Household Tips for Protecting Manatees


Excess fertilizer presents a hazard to our waterways and in turn, our manatees. Fertilizer that is not taken up by plants runs off your property and into our waterways, creating algal blooms that kill seagrasses and harm manatees. Most established landscapes do not need fertilizer at all. If you suspect your lawn needs to be fertilized, get a soil test first. Your local Extension office can help.

Many counties and municipalities prohibit fertilizer use during Florida’s rainy season. Click here to learn more about your local fertilizer ordinances.

An algae bloom in the Indian River Lagoon.An algae bloom in the Indian River Lagoon.


Did you know that more than half of our monthly water use is from irrigation and that many lawn issues (such as dollar weed and grass fungus) are caused by overwatering? Save your lawn and your money by cutting down on irrigation. Install a rain sensor or watch the weather and only turn on your system on when needed.


Grass clippings contain nitrogen and phosphorus that can contribute to algal blooms in a similar way to fertilizers. Instead, keep them on your lawn and recycle those nutrients back into your soil.


Florida Yards and Neighborhoods is a program aimed at helping Floridians have beautiful lawns while still protecting our waterways. It is based on 9 principles that can be used on any yard, large or small. See how they can be used in yours.

Social Media Toolkit

Help spread the word by sharing these images and suggested posts on social media! You can also share your own words and images using the #FertilizerFreeForManatees hashtag.

Tap and hold (or right-click) on the image you would like to download. You can also access additional photos and videos at Then, feel free to copy and paste any of our suggested social media text to go with your post. Don't forget to use the hashtag, #FertilizerFreeForManatees.

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Save Our Seagrass IG
Save Our Seagrass IG

Social post #1
I’m making a difference for manatees this summer!

How? By going Fertilizer-Free for Manatees! Fertilizer can run off into waterways and cause harmful algae blooms, destroying manatee food sources. #FertilizerFreeforManatees #Savethemanatees

Social post #2
I’m going fertilizer-free to protect manatees! By reducing nutrient pollution in waterways, we can help preserve their natural habitat and ensure cleaner, healthier waterways. Join me in making a positive impact for these gentle giants. #FertilizerFreeforManatees #Savethemanatees

Social post #3
Did you know that fertilizers can harm manatees by polluting their habitat? Fertilizer can run off into delicate waterway systems that manatees rely on for refuge and food sources. Let’s all go Fertilizer-Free for Manatees! #FertilizerFreeforManatees #Savethemanatees

Social post #4
I’m going without fertilizer this summer to help protect manatees and their vulnerable waterways. Fertilizer can runoff into bodies of water which has been linked to harmful algae bloom outbreaks in Florida. Join me in taking the pledge to be Fertilizer-Free For Manatees!