NJ Fertilizer Law – How It Applies To You

In 2011, New Jersey enacted a new law that governs the application of phosphorus and nitrogen fertilizer in the state of New Jersey.

This law applies to both homeowners and landscape contractors.

This law is meant to reduce the high levels of eutrophication currently affecting the quality of many our coastal and fresh water bodies.

Limitations on Fertilizer Use

Currently, phosphorus may not be applied unless a soil analysis indicates a deficiency. Nitrogen is restricted to per application and total season amounts, of which a minimum of 20% must be slow-release, meaning water insoluble.

These regulations also require certification and training for commercial landscapers. All of our staff are either certified or trained as required by the 2011 New Jersey Fertilizer law.

The law also creates “black-out” periods for both homeowners and contractors when neither nitrogen nor phosphorus may be applied. The black-out dates typically fall into the following timeframes:

  • Homeowners: November 15 – March 1
  • Commercial applicators: December 1 – March 1

More Information About the NJ Fertilizer Law

For a complete review of the fertilizer law and regulations, visit:


Bill Grundmann

Bill is the owner of Organic Plant Care, LLC. He takes an integrated approach to tree care, focusing not only on the trees themselves but also on the surrounding environment, managing tree health from the "ground up" - healthy soil equals healthy plants. Bill is a New Jersey Licensed Tree Expert and NJ Approved Forester with over 35 years of experience in the tree care industry.