Delaware pesticide license for lawn care: spraying and fertilizing are certified separately

Delaware certifies spraying and fertilizing in two separate programs, and the fertilizer line sits low: a quarter acre of other people's turf. Crews tend to find the second program after finishing the first. The Department of Agriculture (DDA) licenses the spraying, and its Nutrient Management Program certifies whoever puts fertilizer on a lawn for a fee. We read everything here on the agency pages on 2026-10-01.

Only one pesticide exam date is left in 2026

DDA says anyone using or supervising any pesticide on property that isn't theirs or their employer's must be a certified commercial applicator, and that includes general-use products. Exams are given in person at the Ag Education Building on the state fairgrounds in Harrington. The 2026 schedule lists nine Wednesdays. September 23 has passed, which leaves November 18.

Registration and the $30 commercial exam fee are due through your account on the DDA portal at least a week before. Miss the date or turn up late and the fee is gone. Testing starts at noon, with an optional Core review session at 8 a.m. the same morning.

You sit the Core exam plus one category exam, and for lawn work the category is Ornamental and Turf, listed as 03. Both are closed book, with a 70 percent pass mark and three hours to finish. DDA hands out calculators and pencils. If you fail, the retake comes about 45 days later, and only one commercial retake is allowed in 12 months. Manuals are ordered from the same portal account.

The business license is $50 and rides on your insurance policy

Anyone in the business of applying pesticides to another person's land needs a pesticide business license. DDA's highlights sheet adds that this holds even for general-use products and comes on top of a regular business license. The license needs a certified applicator in the category, a notarized application and proof of financial responsibility. The fee is $50 for a year, per Title 3 section 1207 and DDA's 2018 information sheet. The 2021 application PDF the business license page links to returned a 404 when we read it, so use the portal.

The insurance rule is specific. DDA wants a general liability policy with completed operations coverage, with at least $300,000 for bodily injury or death and $100,000 for property damage, each per occurrence. The statute also lets a surety bond or other evidence the department accepts stand in. Nothing on the pages we read says whether the policy must cover damage to the lawn you treated, and that is where a spray claim lands, so ask the agent about an applicator endorsement before you file. The pesticide applicator insurance guide explains the endorsement, and the certificate of insurance guide covers the paperwork.

The license expires December 31 or when the liability policy expires, whichever comes first. Renewal notices go out by October 1. A renewal that arrives after January 1 takes a 20 percent penalty. Line the policy up with the calendar year, or your license will lapse mid-season when the policy does.

Category 03 businesses must put the company name and the license number on every service vehicle, digits two to six inches high. DDA's documents word the format differently: the business license page and its 2018 information sheet say "DDA Lic. No. ####", while the highlights sheet says "DDA Bus. Lic. ####". Ask before the decals are cut.

One rule sounds worse than it is. Title 3 says a certified applicator at the company needs two years of supervised experience. DDA's page limits that to aerial and structural pest control, and section 1211 names turf and ornamental work among the exemptions.

Fertilizer is its own certification

The Nutrient Management Program requires certification for anyone who applies nutrients to land as part of a commercial business. State law sets the turf line at more than a quarter acre, 10,890 square feet, in total, done as a commercial venture for someone else.

The University of Delaware Cooperative Extension runs the certification sessions, and its FAQ answers the lawn care owner's question directly. A company fertilizing client lawns takes Sessions I to IV and passes the Commercial Nutrient Handler exam. One person at the company must be certified, and the rest work under that certification. The statute defines that supervision as being at the same physical location. This is the only state card a fertilizer-only route needs, and a spraying route needs it as well if it also fertilizes.

The certification costs $150 for three years. The exam fee is waived for the first two attempts and $85 after that. The horticulture sessions are December 2 and 9, with exams on December 16, all in Dover, and they run only if at least ten people register. Renewal takes 6 continuing education credits and another $150.

Turf rules come with the card. Nitrogen is capped at 4.8 pounds per 1,000 square feet a year unless a nutrient plan says otherwise, and phosphorus goes on only after an approved lab test shows a deficiency, or to establish or repair turf. None of the DDA pages we read say how a weed and feed bag is treated, so ask which program covers it.

Pesticide renewal is yearly, with credits counted over three

Commercial certification lasts one year. You renew by retaking the exams or by banking credits, and Ornamental and Turf needs 8 credits over a three-year cycle. Each new year, credits from the oldest year drop off. A program has to run at least 50 minutes to count. DDA's FAQ lists the Delaware Nursery and Landscape Association's meetings and Ag Week at the fairgrounds each January among the recurring places to earn credits.

For a class DDA hadn't pre-approved, the two FAQs disagree on timing. The PDF wants the paperwork within 30 days of the event and the web page says the class must have been within the past 60 days. Send it in the shorter window. The pages we read don't state an annual certification fee beyond the $30 exam fee, which DDA applies toward certification.

Helpers and outside licenses

Employees who handle pesticides but aren't certified must be registered as service employees. The business trains them, through DDA's online safety course or an approved program, and files the registration within 45 days of hire. The statute caps the registration fee at $25, and DDA wants written notice within 30 days of anyone leaving. If the crew is growing, the workers' comp guide covers when headcount changes the policy.

A certified commercial applicator from another state can skip the written exam by working for a Delaware-licensed business and applying through the portal's reciprocal path. Service employees can't use it.

Licensed businesses keep a record of every application for two years, and DDA's highlights sheet puts penalties at up to $2,500 per violation.