Fertilizer education
opportunities
For retailers, landscapers, and lawn care professionals
Suffolk County Fertilizer
Turf Management Course
The next virtual
course will be held
in June. The finalized
date will be posted here.
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To protect Long Island's waters, applying fertilizer in Suffolk County from November 1 to April 1 is prohibited. But you've come to the right place to find out how we can have Healthy lawns & Clean water.
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About the law
For homeowners
- Does your lawn need fertilizer?
- How to care for your lawn
- Seasonal tips
For retailers, landscapers, and lawn care professionals
- How the law affects you
- Fertilizer education opportunities
- 'Resource Guide' for employee training
Spread the word
- Best management practices
- Healthy Lawns/ Clean Water Brochure
- Healthy Lawns/Clean Water Sign
Fertilizer Research Summary
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We can have both!
On Long Island, we depend on our groundwater for drinking water. But the nitrogen fertilizer we apply to our lawns - especially when the grass is dormant - can move down through the soil and pollute our aquifer.
This site will help you manage your fertilizer and lawn to protect our groundwater - as well as our surface waters, bays, and estuaries - from pollution due to lawn fertilizers.
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Help keep fertilizer out of our waters!
Image used by permission from the Washington State Department of Ecology.
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