This program regulates fertilizers, soil conditioners, and plant amendments sold in Colorado for agricultural and home use. Product labels and advertisements are monitored for false or misleading statements. Fertilizers are sampled by our inspectors and tested by our Bio-Chemistry Laboratory to verify the listed ingredients.

Laurel Hamling
Fertilizer Program Administrator



The 2020 Fee Schedule has been approved and may now be viewed.

AgLicense records show that 3,075,833 tons of fertilizer distributed in Colorado during calendar year 2018.

The fertilizer, soil conditioner, and plant amendment product registration fee is $40 per product regardless of the size package the product is sold in.

All product registrations and tonnage reports are submitted online via Colorado's AgLicense system. If you have an AgLicense account, you may log in and click on Products, then click the 'Add New' button. Follow the prompts in the system to pay the $40 per product registration fee online via a credit card or an e-check.

If you do not have an online AgLicense account, and you want to register fertilizer products, contact us.

The total tonnage fees are $1.10/ton for fertilizer. This includes a $1.00 Groundwater Protection Program fee as seen on the Fee Schedule, and a $0.10 Fertilizer Program fee.

Further information on the Groundwater Program is available on the Department's Agricultural Water Quality Groundwater Protection Program page.

The tonnage fee for soil conditioners and plant amendments is $0.10/ton.  No Groundwater Protection fee is assessed on soil conditioners and plant amendments.

Fertilizers sold in packages of ten pounds or less are assessed a fee of $0.01025/lb.

Tonnage fees are paid on the calendar year.  The 2019 fertilizer tonnage fees are $0.60/ton, which will be reflected on the tonnage report to be completed online in your AgLicense account. The new tonnage fee is for product distributed in Colorado beginning on January 1, 2020.

Revised fertilizer rules became effective December 30, 2017.  The rules may be viewed by following the Code of Colorado Regulations link on our Laws and Regulations page and navigating to Fertilizers 8 CCR 1202-4. A summary of the changes is in Part 9.7. The public lists of fertilizer and compost test methods used by the Department can be found on our Sampling and Analysis page.

Further information can be found in Frequently Asked Questions.

Quick Links

Information for fertilizer retailers on the necessary documentation needed for an inspection
Fertilizer Inspection

Fertilizer test results from the CDA ICS Biochemistry Lab
Results Jan-Jun 2016

Results Jul-Dec 2016

Results Jan-Jun 2017

The Fertilizer Institute (TFI) - TFI is the leading voice in the fertilizer industry, representing the public policy, communication, and statistical needs of producers, manufacturers, retailers, and transporters of fertilizer.