Wyoming pesticide and fertilizer record rules for lawn care companies

Last reviewed October 11, 2026 · 7 min read

The short answer

In Wyoming, commercial applicators must keep records of every commercial pesticide application, general use and restricted use alike: the name and address of the person it was made for (and who bought the pesticide, if applicable), the location, the size of the area treated, the site, the pest controlled, each pesticide’s brand name, EPA registration number and any special local need number, the total amount applied, the rate and method, the date and time, the temperature and wind direction and speed at the time of application, and the name and certification number of the commercial applicator who made or supervised it, with the name of any apprentice. Before each commercial application the customer must be told the pesticide, residue hazards, restricted entry periods, the date and time and the label’s precautions, and that information is kept too. Keep records 2 years. Wyoming’s rules set no lawn sign for residential or commercial lawns.

General information, not legal advice. Rules change and can depend on what you apply and where. Confirm what applies to your business with the Wyoming Department of Agriculture, Pesticide Program and the product label before you rely on anything here.

Who regulates lawn care applicators

The Wyoming Department of Agriculture administers and enforces the Wyoming Environmental Pesticide Control Act of 1973. A Board of Certification (the Department’s director, a member of the Wyoming weed and pest council and a University of Wyoming weed or pest specialist) may issue rules on certification, licensing and the methods of applying pesticides.

The applicator certification rules are Chapter 28, “Pesticide Applicator Certification”, effective May 1, 2025, which replaced the older Chapter 64 rules. The applicator record rules are in the Department’s Chapter 62, “Pesticide Dealer and Applicator Recordkeeping and Reciprocal Licensing for Pesticide Applicators”, effective December 18, 2024.

The Department has proposed changes to Chapter 62, with public comment open until November 24, 2026. The proposal is not in force. The draft keeps the commercial applicator record list with small changes (renumbered, temperature and wind only for outdoor applications, a fumigation management plan where applicable) and drops private applicators’ restricted use records.

Except as the Act itself provides, no political subdivision (city, county or other) may adopt or enforce any ordinance, resolution, rule or regulation on pesticide storage, sale, distribution, notification of use or use that is more stringent than the Act or its rules.

A first violation of the Act or its rules is a misdemeanor punishable by a fine of up to $500, up to one year in county jail, or both; a later offense carries a fine of up to $1,000, up to one year, or both, and an offense more than three years after a previous conviction counts as a first offense. Any violation of Chapter 28, Chapter 62 or the Act may lead to denial, suspension or revocation of a license.

Sources: Wyoming Statutes Title 35, Chapter 7, Article 3, Division 3 “Environmental Pesticide Control” (W.S. 35-7-350 to 35-7-376), WDA Technical Services: Pesticide Program page, Department of Agriculture rules, Chapter 28 “Pesticide Applicator Certification” (Reference No. 010.0005.28.01082025, effective 01/08/2025), Department of Agriculture rules, Chapter 64 “Applicator Certification Rules and Regulations” (Reference No. 010.0005.64.01082025), Department of Agriculture rules, Chapter 62 “Pesticide Dealer and Applicator Recordkeeping and Reciprocal Licensing for Pesticide Applicators” (Reference No. 010.0005.62.12182024, effective 12/18/2024), Proposed amendment of Chapter 62, Notice of Intent to Adopt Rules and draft rule (authorized 09/30/2026, public notice 10/02/2026, comment period ends 11/24/2026), WDA news: “Notice of Intent to Amend Existing Rules and Regulations – Chapter 62”

Licenses you need

A “commercial application” is the application of any pesticide (other than sanitizers and disinfectants) done for another for compensation through contract or hire, including in, on or around human dwellings, golf courses, parks and institutions such as schools.
Before making a commercial application, a person must be certified in the appropriate category and hold a commercial applicator license. All pesticide applications made for hire must be under the direct supervision of a certified commercial applicator, so the rule covers general use as well as restricted use pesticides.
Category 903, Ornamental and Turf Pest Control, has subcategories for weed control (903A), insect control (903B), disease control (903C) and rodent control (903E) in the maintenance and production of ornamental plantings, including turf.
A commercial applicator must be at least 18, must pass the core exam and at least one category or subcategory exam with at least 70%, and pays a $25 license fee.
A commercial applicator license expires on January 31 of the third year after the year it was issued.
To recertify, a commercial applicator accumulates 24 hours of Department-approved continuing education during the license term or retakes the exams with 70% or better, and must keep records of the courses completed and give them to the Department at renewal. If the requirements are not met before the license expires, the applicator must meet all the requirements for initial certification again.
Commercial applicators must notify the Department of a change of business address within 30 days, and the statute also requires notice of a change of address or employment within 30 days.
Restricted use pesticides may be used only by certified applicators or people working under their direct supervision, and only within the applicator’s category of certification.
Nonresident applicators may get a reciprocal license if their state accepts Wyoming licenses, and must submit a certificate of insurance or proof of bonding; reciprocal license holders may not directly supervise apprentices in Wyoming.

An apprentice commercial applicator performs commercial applications of any pesticide under the direct supervision of a commercial applicator. An apprentice must have completed a Department-approved education course or Worker Protection Standard handler training within the last 12 months, or hold a valid applicator license in an unrelated category, and must submit the Department’s apprentice application, with proof of education and the name of the supervising commercial applicator, before making any commercial application. An apprentice must be at least 18, or at least 16 when the pesticide is not restricted use, the use does not fall under the Worker Protection Standard, it is not applied aerially and the apprentice works under direct supervision.

Direct supervision means the certified applicator gives instructions and control and is available within a reasonable time and distance, deemed not more than one hour and not more than 50 air miles, by telephone or radio, and on site when the use poses a potentially serious hazard. When a product label requires it, the commercial applicator must be physically on site at all times while an apprentice applies, and the supervising applicator must hold the correct category for the specific application.

The supervising applicator must give each apprentice copies of the label and Safety Data Sheet for each pesticide for the whole application, site- and pesticide-specific instructions, clean label-required protective equipment, equipment checked before each day of use, and instruction in the equipment within the last 12 months. They must also create or verify a record of each apprentice’s qualification (for a course: printed name and signature, date, who taught it and its title or description) before the apprentice applies, and have access to it at the principal place of business for two years from the apprentice’s use of a pesticide.

Sources: Department of Agriculture rules, Chapter 28 “Pesticide Applicator Certification” (Reference No. 010.0005.28.01082025, effective 01/08/2025), Wyoming Statutes Title 35, Chapter 7, Article 3, Division 3 “Environmental Pesticide Control” (W.S. 35-7-350 to 35-7-376), WDA-66A “Pesticide Applicator Licensing: Commercial Applicator License” application (5/2025), WDA “Application for Apprentice Applicator”, Department of Agriculture rules, Chapter 62 “Pesticide Dealer and Applicator Recordkeeping and Reciprocal Licensing for Pesticide Applicators” (Reference No. 010.0005.62.12182024, effective 12/18/2024)

What to record for each application

Under Chapter 62, commercial applicators must keep records of every commercial pesticide application, general use and restricted use alike. Each record holds:

The name and address of the person for whom the application was made and, if applicable, who purchased the pesticide
The location of the application
The size of the area treated
The crop, commodity, stored product or site to which the pesticide was applied
The pest controlled
For each pesticide: the brand name, the EPA registration number and, if applicable, the state special local need registration number
The total amount of pesticide applied per location per application, the rate of application and the method of application
The date and time of application
The temperature and wind direction and speed at the time of application
The name and certification number of the commercial applicator who made or supervised the application and, if applicable, the name of any apprentice who made it under direct supervision

The applicator’s records also include the apprentice qualification records required by Chapter 28 Section 6 and the records of customer notification required by Chapter 28 Section 12. It is unlawful to refuse to keep the records the rules require, to refuse the Department’s inspection of them during normal working hours, or to falsify them. The proposed Chapter 62 keeps the same items, limits the temperature and wind item to outdoor applications and adds a completed fumigation management plan where applicable.

Sources: Department of Agriculture rules, Chapter 62 “Pesticide Dealer and Applicator Recordkeeping and Reciprocal Licensing for Pesticide Applicators” (Reference No. 010.0005.62.12182024, effective 12/18/2024), Wyoming Statutes Title 35, Chapter 7, Article 3, Division 3 “Environmental Pesticide Control” (W.S. 35-7-350 to 35-7-376), Proposed amendment of Chapter 62, Notice of Intent to Adopt Rules and draft rule (authorized 09/30/2026, public notice 10/02/2026, comment period ends 11/24/2026)

How long to keep records and who can ask for them

Keep accurate and legible records of all pesticides applied for two years from the date of the application.
Let the Department inspect them during normal working hours.
The Department’s director may enter public or private premises at reasonable times to inspect equipment, lands exposed to pesticides and storage areas, and to investigate complaints of injury.
No rule we read gives the customer a right to a copy of the application record.

Sources: Department of Agriculture rules, Chapter 62 “Pesticide Dealer and Applicator Recordkeeping and Reciprocal Licensing for Pesticide Applicators” (Reference No. 010.0005.62.12182024, effective 12/18/2024), Wyoming Statutes Title 35, Chapter 7, Article 3, Division 3 “Environmental Pesticide Control” (W.S. 35-7-350 to 35-7-376), Department of Agriculture rules, Chapter 28 “Pesticide Applicator Certification” (Reference No. 010.0005.28.01082025, effective 01/08/2025)

Customer notice, posting and lawn signs

Before making a commercial application, the commercial applicator must tell the customer the pesticide to be applied, the possible residue hazards, any restricted entry periods, any waiting periods before harvest, the application date and time, the post-application label safety precautions, and any other label requirements such as posting. Commercial applicators must keep accurate and legible records of that customer information for two years.

The Act and rules set no lawn sign, neighbor notice or registry for applications on residential or commercial lawns; posting appears only for schools and as a label-required practice and exam topic.

Anyone applying a pesticide on or in a building or other property a school district uses mainly for educating students (including activity areas and playgrounds) must notify the district at least 72 hours before; the notice gives the date of application, the location or treatment area, the pest, the name and type of pesticide and a contact. The licensed commercial applicator or school employee applying must also post signs stating the date of application, the location or treatment area, the name and type of pesticide and a contact: for applications inside school buildings at the main entrances and at the entrances to the application area at least 12 hours before, and for an outdoor application next to a school building or on district activity or playground property immediately next to the treated area and at the entrance to the district property; the signs stay up for 72 hours. Antimicrobial pesticides such as disinfectants and sanitizers used by school employees for cleaning, and insect or rodent bait stations of the type available for home use, are exempt.

The Department’s Apiary Mapping Program lets anyone search and download the GPS locations of apiaries reported to it, as a public service that it says is incomplete; it is not a notice requirement.

Sources: Department of Agriculture rules, Chapter 28 “Pesticide Applicator Certification” (Reference No. 010.0005.28.01082025, effective 01/08/2025), Wyoming Statutes Title 35, Chapter 7, Article 3, Division 3 “Environmental Pesticide Control” (W.S. 35-7-350 to 35-7-376), Department of Agriculture rules, Chapter 62 “Pesticide Dealer and Applicator Recordkeeping and Reciprocal Licensing for Pesticide Applicators” (Reference No. 010.0005.62.12182024, effective 12/18/2024), WDA Technical Services: Pesticide Program page

Fertilizer rules

Wyoming’s fertilizer law is the Wyoming Fertilizer Law of 2009, administered by the Department of Agriculture. Its definition of “distributor” includes a person who applies commercial fertilizer, soil conditioner or soil amendment in the state. Each brand and grade of commercial fertilizer (and each soil conditioner and soil amendment) must be registered with the Department before it is distributed, with a $115 fee for each separate formula; a registration expires on the next December 31 and is renewed each year. A product already registered by another person with an identical label does not have to be registered again.

The law deals with registration, labels, sampling and misbranding, and sets no applicator license, nitrogen or phosphorus limit, blackout dates or setbacks for lawns. Its only application record (date of application, kept 2 years) is in the ammonium nitrate section, which takes effect only when the governor certifies federal ammonium nitrate rules, a certification the compiled statute notes had not been made. A conviction under the fertilizer law is a misdemeanor with a fine of $50 to $1,000 for each offense.

Source: Wyoming Statutes Title 11, Chapter 14 “Fertilizer” (Wyoming Fertilizer Law of 2009, W.S. 11-14-101 to 11-14-118)

How GroundsQuote’s chemical records line up

GroundsQuote keeps an application record for each chemical a crew puts down on a job. On a job at a property in Wyoming, Finish job asks the crew for the details Wyoming lists, and the records export with the columns in Wyoming’s order. Here is each item Wyoming lists, set against what the record actually holds. Keeping the record complete and correct is still your responsibility.

Wyoming record items and GroundsQuote’s chemical application record
Wyoming asks for	In GroundsQuote	Status
Name and address of the person for whom applied	Customer name and mailing address	Recorded
Who purchased the pesticide, if applicable	“Bought or supplied from” on each chemical line, offered on Wyoming jobs and filled from the chemical’s usual supplier	Recorded
Location of the application	Address, unit number (on the property), city, state, ZIP and county	Recorded
Size of the area treated	Area treated (sq ft)	Recorded
Crop, commodity, stored product or site	Where on the property (front lawn, beds, fence line… or a description), required on Wyoming jobs at Finish job	Recorded
Pest controlled	Target pest, set for each chemical on the job	Recorded
Brand name	Product name, as entered in the chemical’s setup	Recorded
EPA registration number and state special local need number	EPA Reg. No. and the EUP / Section 18 / 24(c) number, from the chemical’s setup	Recorded
Total amount applied per location per application	Total used	Recorded
Rate of application	Rate applied (per area)	Recorded
Method of application	Equipment used, set on the job; required on Wyoming jobs at Finish job	Recorded
Date and time of application	Date and time applied, with the job’s start and finish times, recorded when the crew starts and finishes it (the office can correct them)	Recorded
Temperature, wind direction and speed at the time of application	The nearest weather station’s reading at the start and finish, which the crew can confirm or replace with what they measured on site (offered on Wyoming jobs)	Recorded
Name and certification number of the commercial applicator who made or supervised it	Applied by and Supervised by (offered on Wyoming jobs), with license and certification numbers when license-keeping is switched on	Recorded
Name of any apprentice who applied under direct supervision	Applied by, with each person’s standing (trained, not certified), and trainees on the job’s record (offered on Wyoming jobs)	Recorded
Apprentice qualification records (printed name and signature, date, who taught it, title or description)	Training and ID records for each person, with a copy of the paper, and a reminder on Finish job; GroundsQuote captures no signature itself and does not check the 12-month window	Partly
Records of telling the customer before each commercial application, kept 2 years	GroundsQuote emails customers with an email address the afternoon before each pesticide job (the pesticides, date and time, re-entry time and the label’s precautions) and logs each notice on the customer’s page; Finish job warns when none is logged; customers without an email address are told and logged by you	Partly
School district notice 72 hours ahead and school signs	Not handled by GroundsQuote: notify the district and post the school signs yourself	Not recorded
License renewal and continuing education	Not handled by GroundsQuote: GroundsQuote keeps license numbers, categories and expiry dates; the 24 hours of continuing education, course records and renewals are yours	Not recorded

GroundsQuote emails the notice before each pesticide job to customers with an email address and logs it; tell the others yourself and log it on their page. Keep the apprentice application and signed qualification records, label and Safety Data Sheet copies for apprentices, daily equipment checks, school notices and signs, license renewals and any fertilizer registration outside GroundsQuote; it does not check direct supervision limits or the supervisor’s 903 subcategory.

Everything a GroundsQuote application record holds

When:: Date and time applied (when the job was finished), job start and finish times (the office can correct them), each chemical’s own start and finish when several go down on one job, and when people may go back onto the lawn (from the label’s re-entry interval)
Where:: Customer name, phone and mailing address, street address, unit number, city, state, ZIP and county of the property, and where on the property it went (front lawn, beds, fence line…)
Who:: Everyone who applied it (the crew riding that day starts checked) and the person supervising, trainees and people who planned it, with each one’s standing (certified, registered technician, trained, not certified or registered), license number, certification or ID number, category and expiry, and the business license when license-keeping is switched on
Product:: Name, type, manufacturer, EPA registration number, state registration number, EUP / Section 18 / 24(c) number, active ingredients, scientific name, concentration, N-P-K and slow-release %, formulation, restricted-use flag, signal word, re-entry interval, the label’s precautions, and copies of the label, safety data sheet and fact sheets on file
Amounts:: Rate applied (per area), area treated in sq ft, total product used (and product and tank mix per acre in the export), mix ratio, use dilution (%), water or carrier (gallons, and the carrier when it is not water), gallons of mix applied, devices placed, lb of N and P per 1,000 sq ft
Job:: Target pest and the equipment used (both set on the job), where the pesticide was bought or supplied from, the vehicle or sprayer’s license plate, where it was mixed and loaded, permit number, other records the label requires, the supervisor’s instructions, whether the drift plan was used, a review sign-off with the reviewer’s license number and corrective action, a map of the treated area attached to the job, service and crew; your business name, address and phone
Weather:: From the nearest weather station at the start and finish (temperature, humidity, wind speed and direction, gusts, rain in the last hour, conditions), and the conditions on site: the crew confirms the station reading or enters the wind, direction and temperature they measured
Your state:: Each job follows the rules of the state its property is in: Finish job asks for the details that state lists and waits until they are filled in, and the records export in that state’s column order
Paperwork:: An application statement for each job to print, leave or email (each product with its EPA number, active ingredients, type, purpose, rate, amount and mix, where on the property, the date and time, who applied it, the re-entry time and your notes for the customer, with the state’s own lines), and lawn signs laid out from the state’s rule
Kept beside the records:: Each person’s training, ID copies and certificates and what they are responsible for; neighbor requests and notices, registry notices and attempts, notices given to customers, signed waivers and contracts, each with a copy of the paper; soil tests per property; incidents, disposal and purchases in the chemical logs; totals for a year or a month by county, supervisor or product; whether a customer agreed in writing to get application information by email
Changes:: Corrections are saved as history; the earlier record is kept
Reminders:: Finish job reminds the crew of the state’s own steps (a record deadline, trainee paperwork) and warns when a restricted-use chemical has nobody certified applying or supervising it; the schedule lists chemical jobs left without a record in states with a deadline

See how it works on the job in chemical records and field tools, or read about GroundsQuote for lawn treatment companies.

Official sources

Everything on this page comes from these Wyoming sources, checked on October 11, 2026. Read them for the full text and any changes since.

Keep application records as the crew finishes the job

Set the chemicals each service uses once. The crew sees the planned amounts for each lawn, and finishing the job saves the record with the product, rate, area, applicator and weather.

Start your 30-day free trial

Chemical records are on the Pro and Business plans.

Questions

Do I need records for general use products, or only restricted use?

Both. Wyoming’s Chapter 62 requires commercial applicators to keep records of every commercial pesticide application, general use and restricted use alike, and all applications made for hire must be under the direct supervision of a certified commercial applicator.

Do I have to tell the customer before each application?

Yes. Before making a commercial application, the commercial applicator must tell the customer the pesticide to be applied, the possible residue hazards, any restricted entry periods, any waiting periods before harvest, the application date and time, the post-application label safety precautions, and any other label requirements such as posting, and keep a record of that information for two years.

How long do I keep Wyoming application records?

Two years from the date of the application, accurate and legible, and open to the Department’s inspection during normal working hours.

Do I need lawn signs in Wyoming?

Wyoming’s Act and rules set no lawn sign, neighbor notice or registry for residential or commercial lawns, and cities and counties may not adopt rules on notification of use that are more stringent than the Act. Signs are required only for applications on school district property, and label-required posting still applies.

Can people without a license apply pesticides for my company?

Only as apprentice commercial applicators under the direct supervision of a commercial applicator. An apprentice needs Department-approved education or Worker Protection Standard handler training within the last 12 months (or a license in an unrelated category) and must submit the Department’s apprentice application before making any commercial application.

Does Wyoming have a turf fertilizer law for lawn care companies?

We found none. The Wyoming Fertilizer Law of 2009 deals with product registration, labels, sampling and misbranding, and sets no applicator license, nitrogen or phosphorus limit, blackout dates or setbacks for lawns.