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.
The 2017 Fee Schedule has been approved and may now be viewed.
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 login 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 AgLicense account, download and complete the Colorado Fertilizer Product Registration Form, print, and send to the address on the form with a check for $40 per product.
The tonnage fees remain $0.60/ton for fertilizer. This includes a $0.10 distribution fee (as seen on the schedule), and a $0.50/ton groundwater protection fee. Further information on the Groundwater Program is available on the Department's Groundwater Program Page.
The tonnage fee for soil conditioners and plant amendments remains $0.10/ton. No groundwater fee is due 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 2016 fertilizer tonnage fees are $0.60/ton, which will be reflected on the tonnage report to be completed online in your AgLicense account.
Revised fertilizer rules became effective December 30, 2012. 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 9.3. 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.
Information for fertilizer retailers on the necessary documentation needed for an inspection
Questions & Answers on the Colorado Fertilizer Law