Iowa pesticide and fertilizer record rules for lawn care companies

Last reviewed October 11, 2026 · 8 min read

The short answer

In Iowa, every commercial applicator must keep office records of all application activities for each pesticide applied, general use as well as restricted use: the licensee’s name and license number, the customer’s name and address, the address of the place of application, the date, the time the application begins and ends, the trade name and EPA registration number, the quantity used, the concentration or rate and the size of the treatment area, for outdoor work the temperature and the wind direction and estimated speed, the site for a restricted use pesticide, the name and certification number of the certified applicator who made or supervised the application, and any noncertified applicator. Keep records three years and furnish copies to the Department on written request. In urban areas, post a sign at the start of the application and leave it for at least 24 hours.

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

Who regulates lawn care applicators

The Iowa Department of Agriculture and Land Stewardship (IDALS), through its Pesticide Bureau, licenses and certifies pesticide applicators and investigates pesticide misuse under the Pesticide Act of Iowa, Iowa Code chapter 206. The Department’s pesticide rules are Iowa Administrative Code 21—chapter 45, which was largely rewritten with an effective date of January 1, 2026.

A “commercial applicator” is a person, corporation or employee who contracts, for monetary payment, to perform a service by applying a pesticide. It is unlawful to use any pesticide contrary to its labeling or to Iowa rules that further restrict its use.

Chapter 206 and the Department’s rules preempt city, county and other local legislation on the use, sale, distribution, storage, transportation, disposal, formulation, labeling, registration or manufacture of a pesticide; local laws of general application to commercial activity are not affected. The Department may assess a civil penalty of up to $500 for each offense against a commercial applicator, and other violations of chapter 206 are serious misdemeanors.

Sources: Iowa Code 2026, chapter 206 "Pesticides" (Pesticide Act of Iowa), Iowa Administrative Code 21—chapter 45 "Pesticides" (IAC 4/30/25; ARC 9145C, effective 1/1/26), IDALS Pesticide Bureau page, IDALS "New Certified Private and Commercial Applicator Standards Going into Effect in 2026", IDALS Pesticide Use Investigation & Enforcement page, IDALS Pesticide Code and Rules page (links to the current rule list, pubDate 01-07-2026)

Licenses you need

Commercial applicator license: no person may engage in the business of applying pesticides to the land or property of another without a commercial applicator license from the Department, and a commercial applicator may not apply any pesticide, general use included, without meeting the certification requirements.
Everyone who applies is certified: the license is renewed only if all of the business’s personnel who apply pesticides are certified, in the classifications covering their work; the Department states that each individual who applies pesticides for a commercial applicator must be certified.
New employees: a new employee need not be certified to apply general use pesticides for 21 days from initial employment while under the direct supervision of a certified applicator who is physically present, in sight or hearing distance. Separately, a person may apply a general use pesticide without meeting the licensing requirements on presenting evidence to the Secretary that the application is made under the direct supervision of a licensed commercial applicator or a public applicator.
Ornamental and Turf Pest Control covers using or supervising the use of pesticides on ornamental plants and turf grass, including in and around structures. It has four subcategories: ornamental and turf, turf only, ornamental only (no turf), and greenhouse.
Exams: a separate examination must be passed for each category or subcategory; the Department gives the exams, and the oral exam option was discontinued with the 2026 rules. A commercial applicator must be at least 18 years old.
Fees and expiry: certification costs $75 for three years and expires December 31 of the third year; the license fee is at most $25 a year and the license expires December 31 each year. A renewal not filed before January 1 carries a 25 percent delinquent fee, unless the applicant furnishes an affidavit that they have not applied pesticides after the license expired.
Recertification: pass an examination every third year, or attend two hours of approved continuing instruction in each year of the renewal period, in each category being renewed. The licensee keeps a file of continuing instruction certificates of completion for each employee recertifying by courses, covering the previous and current certification periods, open to inspection by the Department.
Employees on the application: each license application lists all employees who may apply pesticides, and changes in their status and new employees must be reported to the Department immediately.
Handlers: employees who mix or load pesticides from opened containers for application by someone else must pass an exam as certified handlers (21-day grace period from initial employment) and work under the direct supervision of a certified applicator of the same firm.
Restricted use: a noncertified applicator may apply a restricted use pesticide only under the direct supervision of a certified applicator certified in that category, must be at least 18, and must have been instructed within the last 12 months in the safe operation of the mixing, loading and application equipment. The supervising applicator keeps records of their qualifications for two years from the restricted use application, including the noncertified applicator’s name and signature and the supervising applicator’s certification number, issuing state and expiration date, and furnishes copies to the Department on written request.
Bond or insurance: before a commercial license is issued, furnish a surety bond, liability insurance or irrevocable letter of credit of at least $100,000 for property damage and $100,000 for public liability, or liability insurance of $100,000 per occurrence and $300,000 annual aggregate, kept at that amount throughout the licensed period. Notify the Department 10 days before a bond or insurance is reduced or cancelled, and 90 days before a letter of credit is.

Persons making pesticide use recommendations may not recommend anything contrary to the label, and the employer or licensee is responsible for such recommendations made by employees. Commercial pesticide applicators must also file an annual report with the Department by October 1 on the gross dollar amount of pesticides sold at retail for use in Iowa, listing each product (label name and EPA registration number) with retail sales of $3,000 or more. We could not confirm whether that report applies to a lawn care company that does not sell pesticides at retail apart from its application service.

Sources: Iowa Code 2026, chapter 206 "Pesticides" (Pesticide Act of Iowa), Iowa Administrative Code 21—chapter 45 "Pesticides" (IAC 4/30/25; ARC 9145C, effective 1/1/26), IDALS "New Certified Private and Commercial Applicator Standards Going into Effect in 2026", IDALS "Understanding Pesticide Applicator Rule Changes" (terms)

What to record for each application

Iowa Code 206.15 directs the Department to require commercial applicators to keep records of their pesticide applications. Under 21—45.26(3), every commercial applicator must make, or have made, office records of all application activities for each pesticide applied, general use as well as restricted use. When more than one licensed commercial applicator is involved in an application, or it is billed through a licensed pesticide dealer, each licensee must keep the records. Each record holds:

The name and license number of the licensee
The name and address of the landowner or customer
The address of the place of application (the rule’s wording ties this item to restricted use pesticides)
The date of the application
The trade name and EPA registration number of the pesticide product used
The quantity of pesticide product used, the concentration or rate of application, and the size of the treatment area
When applicable to an outdoor application: the temperature and the direction and estimated speed of the wind at the time of application
For a restricted use pesticide: the crop, commodity, stored product or site to which it was applied
The time the application begins and ends
The name and certification number of the certified applicator who made or supervised the application
When applicable: the name of any noncertified applicator who made the application under direct supervision

Sources: Iowa Code 2026, chapter 206 "Pesticides" (Pesticide Act of Iowa), Iowa Administrative Code 21—chapter 45 "Pesticides" (IAC 4/30/25; ARC 9145C, effective 1/1/26)

How long to keep records and who can ask for them

Keep application records for three years from the date of application, and furnish copies to the Department on written request.
The Department’s investigators review application records and pesticide labels during a misuse investigation.
A person claiming damage from a pesticide application must file a written statement with the Department within 60 days after the damage occurred.
The label and other information normally associated with a pesticide applied in a posted urban area must be provided to any individual who asks.
When a pesticide’s labeling requires further maintenance after application, the applicator must give the homeowner or agent in charge of the property a copy of the complete label if requested, and instructions on proper maintenance procedures.

Customer notice, posting and lawn signs

Commercial and public applicators applying pesticides in urban areas must post notification signs at the start of the application and leave them for at least 24 hours afterward, or longer if the label’s reentry directions require. “Urban” means any area within or belonging to a city or developed residential area. Posting is not required for applications inside a structure, within six feet of a structure’s outside perimeter, or made by a homeowner or tenant on their own property.

Placement: on residential lawns the sign must stand at least 12 inches above the grass line or 18 inches to its top, on the lawn 2 to 5 feet from the sidewalk or street; an unfenced or open backyard is also posted 2 to 5 feet from the back lot line. Where landscaping or other obstructions prevent those distances, place the sign in a way reasonably within the intent of the rule. For parks, athletic fields and playgrounds, signs go immediately next to the treated areas and at or near the entrances to the property.
Size and material: at least 4 by 5 inches with letters at least three-eighths of an inch, made of a material that resists rain for at least 24 hours.
Wording: in contrasting colors and block letters, the name and telephone number of the business applying the pesticide and the words “This area chemically treated. Keep off. Do not remove sign for twenty-four hours.” A universally accepted symbol and text approved by the Secretary may be used instead, and when the label requires a longer reentry restriction, the sign must say so.
How long: the applicator may not remove the sign for at least 24 hours (or the label’s longer reentry restriction), and must give the property owner, tenant or person in charge instructions that the sign must stay in place at least 24 hours. After the posting period, the signs should be removed by the applicator’s business or by the property owner or person in charge.

Neighbor notice: an applicator must give prior notice only to an occupant of a property adjoining an urban lawn, park, playground or athletic field who asked for it in a timely manner. The request is made to the applicator in writing, giving the occupant’s name and address, a telephone number where they can be reached during normal business hours and evening hours, and the address of each property that adjoins theirs. After such a request, give notice at least the calendar day before a scheduled application to the adjoining property, in writing, in person or by phone, stating the date and approximate time of day. If notice is not given in writing, document that it was given and keep a record of it at your place of business. If the occupant cannot be reached, leave a written notice with the date and approximate time at the requester’s residence at least the calendar day before the application. A request expires on December 31 each year, or when the occupant no longer lives there, whichever is earlier.

Instead of announcing its own public health pest control applications (mosquitoes and the like) through mass media, a municipality may keep a registry of people who want notice and notify them at least 24 hours before an application next to their property; the registry is available to licensed commercial and public applicators on request.

Bees: between 8 a.m. and 6 p.m., a commercial applicator may not apply pesticides labeled as toxic to bees to blooming crops within one mile of an apiary registered and listed on the sensitive crop registry. Iowa’s Sensitive Crops Registry is run with FieldWatch (DriftWatch for specialty crops, BeeCheck for beehives) so applicators can see registered sites.

Fertilizer rules

Anyone who manufactures, mixes, blends, mixes to a customer’s order, offers for sale, sells or distributes any fertilizer or beneficial substance in Iowa must first obtain a license from the Secretary ($20 for each place of manufacture or distribution), which expires July 1 of the even-numbered year after it is issued and may be renewed for two years. Only licensed persons may add pesticides to commercial fertilizers, and the mixture must be registered and labeled under both the fertilizer and pesticide laws. The fertilizer law preempts local legislation on the use, sale, distribution, storage, transportation, disposal, formulation, labeling, registration or manufacture of fertilizer.

Iowa’s fertilizer law and rules set no applicator certification, per-application record, phosphorus or nitrogen limit, blackout dates or setbacks for lawn fertilizer. “Specialty fertilizer” (commercial fertilizer distributed primarily for nonfarm use, such as lawns, gardens and golf courses) is exempt from the minimum phosphoric acid, nitrogen and potash percentages other fertilizers sold in Iowa must meet. Fertilizer licensees who distributed specialty fertilizer, or who apply specialty fertilizer for compensation, must file by the last day of July each year an annual statement of the tons of nitrogen-containing fertilizer distributed in Iowa. We could not confirm whether a lawn care company that only applies fertilizer it bought needs a fertilizer license.

Sources: Iowa Code 2026, chapter 200 "Fertilizers and Beneficial Substances", Iowa Administrative Code 21—chapter 43 "Fertilizers and Agricultural Lime" (IAC 2/5/25)

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 Iowa, Finish job asks the crew for the details Iowa lists, and the records export with the columns in Iowa’s order. Here is each item Iowa lists, set against what the record actually holds. Keeping the record complete and correct is still your responsibility.

Iowa record items and GroundsQuote’s chemical application record
Iowa asks for	In GroundsQuote	Status
Name and license number of the licensee	Your business name and the business license, when license-keeping is switched on	Recorded
Name and address of the landowner or customer	Customer name and mailing address	Recorded
Address of the place of application	Address, unit number (on the property), city, state, ZIP and county	Recorded
Date of application	Date applied	Recorded
Trade name and EPA registration number	Product name and EPA Reg. No., from the chemical’s setup	Recorded
Quantity of product used	Total used	Recorded
Concentration or rate of application	Rate applied (per area), mix ratio and use dilution (%)	Recorded
Size of the treatment area	Area treated (sq ft)	Recorded
Outdoor applications: temperature, wind direction and estimated speed at the time of application	The nearest weather station’s reading at the start and finish, and conditions on site that the crew confirms or measures	Recorded
Restricted use: crop, commodity, stored product or site	Where on the property (front lawn, beds, fence line… or a description), set on the job	Recorded
Time the application begins and ends	The job’s start and finish times, recorded when the crew starts and finishes it, or each chemical’s own start and finish time	Recorded
Name and certification number of the certified applicator who made or supervised the application	Applied by and Supervised by, with license and certification numbers when license-keeping is switched on	Recorded
Name of any noncertified applicator under direct supervision	Applied by, with each person’s standing (certified, trained…), and trainees on the job’s record	Recorded
Noncertified applicator qualification record: name and signature, supervisor’s certification number, issuing state and expiration, kept two years	Training and ID records for each person, with a copy of the paper, and license number and expiry; GroundsQuote does not collect a signature, has no issuing state field and does not track the two-year retention	Partly
Record of a prior notice to an adjoining occupant that was not given in writing	Neighbor requests and notices can be logged by hand on a customer’s page with a copy of the paper; the neighbor is usually not your customer	Partly
File of continuing instruction certificates for each employee	Training and certificate records for each person; GroundsQuote does not check the two hours a year per category	Partly

On Iowa jobs, Finish job asks for the conditions on site, the export can follow Iowa’s record order, and GroundsQuote prints Iowa’s lawn sign and puts the 24-hour instruction on the application statement; posting the sign and handing over the statement are yours. Keep the neighbor prior-notice requests and notices, the annual reports, the employee and insurance notices to the Department, the bond or insurance proof, licensing and continuing instruction outside GroundsQuote; it files nothing with the state and does not check registered apiaries.

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, 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), 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 Iowa 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.

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Questions

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

Both. Iowa’s rule requires every commercial applicator to make office records of all application activities for each pesticide applied, general use as well as restricted use. Two items, the address of the place of application and the site, are worded for restricted use pesticides.

Does everyone on my crew need to be certified?

The license is renewed only if all of the business’s personnel who apply pesticides are certified in the classifications covering their work. A new employee need not be certified to apply general use pesticides for 21 days from initial employment while a certified applicator is physically present, in sight or hearing distance.

How long do I keep application records in Iowa?

Three years from the date of application, with copies furnished to the Department on written request.

Do I need lawn signs in Iowa?

Yes, in urban areas (any area within or belonging to a city or developed residential area). Post the sign at the start of the application and leave it for at least 24 hours, or longer if the label’s reentry directions require. It must be at least 4 by 5 inches with letters at least three-eighths of an inch, and show your business’s name and telephone number and the words “This area chemically treated. Keep off. Do not remove sign for twenty-four hours.”

Do I have to notify neighbors before an application?

Only an occupant of an adjoining property who asked you in writing in a timely manner. Then give notice at least the calendar day before the application, in writing, in person or by phone, with the date and approximate time of day. Requests expire on December 31 each year, or when the occupant no longer lives there.

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

Iowa’s fertilizer law and rules set no applicator certification, per-application record, phosphorus or nitrogen limit, blackout dates or setbacks for lawn fertilizer. They deal with licensing of sellers, registration, labeling, tonnage reports, fees and storage.