Delaware pesticide and fertilizer record rules for lawn care companies

Last reviewed October 10, 2026 · 7 min read

The short answer

In Delaware, a commercial applicator must record every pesticide application, general use as well as restricted use, within 24 hours: the brand name (and the EPA number for restricted use or Worker Protection Standard products), the dilution and amount applied, the date, the area and the customer’s name and address, the pest and what was treated with the size of the area, the applicator, and the on-site weather when the label warns about drift. Keep those records 2 years. Commercial nutrient handlers fertilizing turf keep a separate log made at the time of each application, and from January 1, 2027 anyone fertilizing turf for a fee must be certified as a commercial nutrient handler.

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

Who regulates lawn care applicators

The Delaware Department of Agriculture regulates the sale, use and application of pesticides under the Delaware Pesticide Law (3 Del.C. Chapter 12) and its rules, 3 DE Admin. Code 601, “Delaware Pesticide Rules and Regulations”.

Fertilizer on turf is regulated separately, by the Delaware Nutrient Management Commission with the Department of Agriculture, under 3 Del.C. Chapter 22. The Commission’s turf rules are 3 DE Admin. Code 1204, “Nutrient Management Turf Specific Regulations”.

Sources: 3 Del.C. Ch. 12 Pesticides, Subchapter I General Provisions, 3 DE Admin. Code 601 Delaware Pesticide Rules and Regulations, 3 Del.C. Ch. 22 Nutrient Management, Subchapter III State Nutrient Management Program, 3 DE Admin. Code 1204 Nutrient Management Turf Specific Regulations

Licenses you need

Pesticide business license: no one may be in the business of applying pesticides to another’s land or property without one. The Department says this covers general use as well as restricted use pesticides. The license is only issued, and only stays valid, while the owner is certified or employs a certified applicator at all times.
The license costs $50 a year or $100 for two years, on a signed and notarized application. Ornamental and turf businesses must show liability insurance with completed operations coverage of at least $300,000 for bodily injury or death per occurrence and $100,000 for property damage. Licenses run to December 31; a renewal not filed before January 1 carries a 20 percent late penalty.
Certified applicator: lawn care is Ornamental and Turf Pest Control (Category 03). Certification takes a written core exam and a category exam, each passed with at least 70%, and applicants must be at least 18. It costs $30 a year and runs to December 31.
Recertification: to renew without retaking the exam, a Category 03 applicator needs 8 hours of approved training in the 3 calendar years before renewal (the first 2 renewals are exempt). An expired certificate has a 90-day grace period, during which you may not buy, use or supervise restricted use pesticides or act as the license’s certified applicator; after that you must be examined again.
Restricted use pesticides may only be used by a certified applicator or someone under a certified applicator’s direct supervision.
Employees: register every employee who handles pesticides with the Department, at license application or within 45 days of hiring ($25 each, waived for certified employees). Non-certified employees must finish Department-approved training within 45 days and before registration, updated every 12 months, may not apply restricted use pesticides, and must carry their registration card while working. Report an employee leaving within 45 days.
The two years of supervised experience the law asks of some license holders applies to the general pest, wood-destroying pest and fumigation categories (7A, 7B, 7C); the law says exemptions from it shall include people applying pesticides to turf or ornamental plants.
Fertilizer: anyone who applies nutrients to more than 1/4 acre (10,890 sq ft) of turf as a business for others must be certified by the Nutrient Management Commission or use a certified person or firm. Under the turf regulation, from January 1, 2027 anyone who applies or supervises nutrient application to turf for a fee must first be certified as a commercial nutrient handler. That takes at least 12 credits of approved coursework and a written test, costs $150 for 3 years, and needs 6 continuing education credits in each 3-year period. Workers applying under the direct supervision of a certified person do not need their own certificate.

Tip: Ornamental and turf licensees must show the full business name and the pesticide business license number on every service vehicle, the number in bold figures 2 to 6 inches high. The Department gives the format as “DDA Bus. Lic. ####”.

Sources: 3 Del.C. Ch. 12, Subchapter II Regulation of Sale and Use, 3 DE Admin. Code 601 Delaware Pesticide Rules and Regulations, DDA Pesticide Management: Applicators, DDA Pesticide Management: Frequently Asked Questions, 3 Del.C. Ch. 12, Subchapter III Certification of Applicators, DDA: Highlights from the DE Pesticide Law and DE Pesticide Rules & Regulations (PDF), 3 Del.C. Ch. 22 Nutrient Management, Subchapter III State Nutrient Management Program, 3 DE Admin. Code 1204 Nutrient Management Turf Specific Regulations, 3 DE Admin. Code 1201 Nutrient Management Certification Regulations, DDA Nutrient Management: Certification and Education

What to record for each application

Under 3 DE Admin. Code 601 § 14.1, commercial applicators record every pesticide application, general use and restricted use alike. Log it right away, or within 24 hours of finishing the application unless there is good cause. Each record holds:

The brand name of the pesticide
For a restricted use pesticide, or one used under the federal Worker Protection Standard, the EPA registration number, recorded at or before the time of application
When applicable, the dilution rate and the amount of diluted material applied per unit (for example gallons or pounds per acre)
The date and the specific area treated, with the name and address of the person it was applied for
The pest it was used against, what it was applied to, and the size of the treatment area
The applicator’s name and, when applicable, the name of the certified applicator supervising the registered employee
When the label advises drift precautions: the wind speed and direction, temperature and relative humidity on site

A copy of the label of the pesticide being used must be at the application site. Making false records is a class A misdemeanor and failing to keep the required records is an unclassified misdemeanor; the Secretary may also assess a civil penalty of up to $2,500 per offense.

Commercial nutrient handlers applying nitrogen or phosphorus to turf keep a log, recorded at the time of application, with: the applicator’s name, the size of the area fertilized, the date, the client’s address and location, the rate, the total fertilizer used, the fertilizer’s analysis, and an original or legible copy of the fertilizer label. The certification regulation also requires commercial nutrient handlers to keep a log made at the time of the dates, locations, approximate quantities, acreage and methods of nutrient application.

Sources: 3 DE Admin. Code 601 Delaware Pesticide Rules and Regulations, 3 Del.C. Ch. 12, Subchapter IV Unlawful Acts; Penalties, 3 DE Admin. Code 1204 Nutrient Management Turf Specific Regulations, 3 DE Admin. Code 1201 Nutrient Management Certification Regulations

How long to keep records and who can ask for them

Pesticide application records: 2 years from the date of application.
The Department may inspect books and records relating to the use of pesticides; on private premises it enters with the occupier’s written approval or a search warrant.
Turf fertilizer log: available for inspection at all times by the Secretary of Agriculture (or a designee) or the Nutrient Management Commission. Ask the Department how long to keep it.
Nutrient handler records under the certification regulation (including its application log): 6 years.

Sources: 3 Del.C. Ch. 12, Subchapter VII Miscellaneous, 3 DE Admin. Code 601 Delaware Pesticide Rules and Regulations, 3 Del.C. Ch. 12, Subchapter V Inspection and Seizure, 3 DE Admin. Code 1204 Nutrient Management Turf Specific Regulations, 3 DE Admin. Code 1201 Nutrient Management Certification Regulations

Customer notice, posting and lawn signs

We found no lawn-sign, posting or customer pre-notification requirement for turf applications in Delaware’s pesticide law or regulation. The one on-site duty is that, on request, the applicator must give any interested person at or next to the application site any information on the pesticide label.

Sources: 3 Del.C. Ch. 12 Pesticides, Subchapter I General Provisions, 3 Del.C. Ch. 12, Subchapter II Regulation of Sale and Use, 3 DE Admin. Code 601 Delaware Pesticide Rules and Regulations, DDA: Highlights from the DE Pesticide Law and DE Pesticide Rules & Regulations (PDF)

Fertilizer rules

The turf regulation’s limits are stricter than the yearly nitrogen cap in the statute, so these are the ones to follow. In the regulation, “turf” is closely mowed, managed grass on residential, commercial and public land; it leaves out athletic fields, golf courses, residential lots under 1/4 acre (10,890 sq ft) and sod and seed production.

Turf over 1/4 acre without a nutrient management plan: no more than 3.0 lb of nitrogen per 1,000 sq ft a year and 1.0 lb per 1,000 sq ft per application. The yearly cap rises to 3.5 lb when enhanced efficiency fertilizers are under 70% of the products used and 4.0 lb when they are over 70%; the per-application cap stays 1.0 lb.
Phosphorus only when a soil test shows a phosphorus fertility index value under 100, with a test for each new customer and every year in any 12-month period you will apply phosphorus.
No nitrogen or phosphorus within 15 feet of waterways or wetlands, or 10 feet with a drop spreader, a rotary spreader with a deflector shield, or a targeted spray.
Keep fertilizer off impervious surfaces; sweep anything that lands there back into the lawn or remove it and dispose of it properly.
Without a nutrient management plan, certified commercial nutrient handlers (and those required to be certified) may not apply nitrogen or phosphorus between December 7 and February 15, on snow-covered or frozen ground, or where fertilizer misdirected onto an impervious surface is not removed the same day.
Under the turf regulation a first offense brings education and a chance to correct it, a second a $500 penalty and a third $1,000; certificate suspension is decided at a Commission hearing. The statute lets the Commission fine $125 to $5,000 per violation, each day counting separately, up to $10,000.

Sources: 3 DE Admin. Code 1204 Nutrient Management Turf Specific Regulations, 3 DE Admin. Code 1201 Nutrient Management Certification Regulations, 3 Del.C. Ch. 22 Nutrient Management, Subchapter III State Nutrient Management Program

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

Delaware record items and GroundsQuote’s chemical application record
Delaware asks for	In GroundsQuote	Status
Brand name of the pesticide	Product name, as entered in the chemical’s setup	Recorded
EPA registration number (restricted use or Worker Protection Standard products)	EPA Reg. No., from the chemical’s setup	Recorded
Dilution rate and amount of diluted material per unit	Rate applied, mix ratio and gallons of mix applied, set on the job	Recorded
Date of application	Date applied	Recorded
Specific area treated	Where on the property (front lawn, beds, fence line… or a description), set on the job, with the area treated (sq ft)	Recorded
Name and address of the person it was applied for	Customer, address, city, state, ZIP and county	Recorded
Pest the pesticide was used against	Target pest (editable on the job)	Recorded
What it was applied to	Where on the property (front lawn, beds, fence line… or a description), set on the job and the service	Recorded
Size of the treatment area	Area treated (sq ft)	Recorded
Applicator’s name	Applied by: everyone riding with the crew that day starts checked, and the crew unchecks anyone who did not apply it	Recorded
Certified applicator supervising a registered employee	Supervised by, with the supervisor’s license number when license-keeping is switched on	Recorded
On-site wind speed and direction, temperature and humidity (when the label advises drift precautions)	Conditions on site: the crew confirms the nearest weather station’s reading (temperature, humidity, wind speed and direction) or enters the wind, direction and temperature they measured	Recorded
Fertilizer log: applicator’s name	Applied by, as above	Recorded
Fertilizer log: date, size of area, client’s address and location, rate, total used	Date applied, area treated, address and county, rate applied, total used	Recorded
Fertilizer log: analysis of the product	Analysis (N-P-K), from the chemical’s setup	Recorded
Fertilizer log: copy of the label	A copy of the label (PDF or photo) kept on each chemical; each record notes the label it was applied under	Recorded
Nutrient handler log: method of application	Equipment used, set on the job (it starts from the chemical’s setup)	Recorded

Keep a copy of each pesticide label at the application site: crews can open the label kept in GroundsQuote from the job on their phone.

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), 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, 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, with each one’s standing (certified, registered technician, trained, not certified or registered), license 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, N-P-K and slow-release %, formulation, restricted-use flag, signal word, re-entry interval, and a copy of the label on file
Amounts:: Rate applied (per area), area treated in sq ft, total product used, mix ratio, water or carrier, gallons of mix applied, lb of N and P per 1,000 sq ft
Job:: Target pest and the equipment used (both set on the job), service and crew
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
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
Changes:: Corrections are saved as history; the earlier record is kept

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 Delaware sources, checked on October 10, 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. Delaware’s rule covers every pesticide application by a commercial applicator, general use and restricted use alike, and the Department says anyone applying either kind for hire must be certified and licensed.

Do I have to record the EPA registration number for every product?

The regulation asks for it for restricted use pesticides and those used under the federal Worker Protection Standard, recorded at or before the time of application. For other products it asks for the brand name.

Do Delaware’s turf fertilizer limits apply to small lawns?

The turf regulation’s definition of turf leaves out residential lots under 1/4 acre (10,890 sq ft), and its nitrogen limits are stated for turf over 1/4 acre. The December 7 to February 15 blackout in the certification regulation applies to certified commercial nutrient handlers on land without a nutrient management plan.

Other states

Pesticide and fertilizer record rules by state →