Maryland pesticide business license and applicator certification: what they cover and your first 30 days

Published November 8, 2026 · Rules checked November 8, 2026

• Free to read. The 30-day checklist is also a free printable (Google Docs, Word or PDF). The files come by email.
• Deepsel is our product: free estimate, invoice and scheduling software for contractors (scheduling, quotes, invoicing, card payments, and service plans for recurring visits). The section before the FAQ says where it fits and where it doesn't.
• Not legal advice. Every rule here links to the regulation or official page it comes from. Ask MDA's Pesticide Regulation Section (410-841-5710) or a Maryland attorney before you bet a job on my reading.

A Maryland pesticide business license lets your company sell and do pest control in the categories one of your people is certified in. It costs $150 a year, runs July 1 to June 30, and needs three things on file with the Maryland Department of Agriculture (MDA): an application, a certified applicator designated for each category you work in, and liability insurance of at least $100,000 each person and $300,000 each occurrence for bodily injury, and $15,000 and $30,000 for property damage.^1,4 Lawn companies count. MDA's own definition of pest control "includes lawn care companies using weed and feed or organic pesticides, landscapers using Roundup or animal repellents."¹

The license is the start. In the first month you also register every employee who sells, services or inspects, put "MDA" and your license number on both sides of each truck, change your paperwork so every customer gets the written information the rules list, and, if you treat lawns, post the yellow sign and call the neighbors on MDA's pesticide-sensitive list. A lawn company that fertilizes needs a second certificate and a second license under a different chapter of the regulations, with different dates. Montgomery County adds its own lawn pesticide law on top.^5,7,11,12

New owners get wrong answers about this all the time, because the rules really do differ by state. On r/PestControlIndustry one commenter told a newcomer "You need to hold an applicators license for 2 years before you can even test for a qualified party license," and the next reply was "That depends on location" (September 2025, reply). Neither was talking about Maryland. Below is Maryland only, from the regulations and MDA's pages as I read them on November 8, 2026; the pesticide categories and agencies for the other states are in the lawn care business license table. Pricing your visits is in pest control pricing, and the contract your customers sign is the pest control service agreement template.

The 30-day checklist is also a printable: make your own copy in Google Docs (lands in your Drive), download the Word version (.docx), or download the PDF. Pick a format, enter your email and I'll send the links. It's the same list as on this page, four pages with tick boxes and blanks for your license, certificate, insurance and fertilizer numbers.

Who needs a Maryland pesticide business license, and what it costs

MDA's definition is wide. Pest control means "engaging in, or offering to engage in, recommending, advertising, soliciting the use of, supervising the use of, or using, a pesticide or device" to identify, control or prevent a pest "in, on, or around any house, building, water, air, land, plant, structure, or animal." Then the line that settles it: "A pesticide business license is required in order to provide these services."¹ Heat and freezing devices for structural pests are included. So is a landscaper spot-spraying mulch beds.

Sources for the table: MDA's licensing page and COMAR 15.05.01.10.^1,4 Two related licenses you probably don't need: a pest control consultant license (for selling advice and recommendations without applying, January to December, no insurance requirement) and a not-for-hire license (for a golf course or similar property treating its own grounds).¹

Pest control categories: which ones a pest firm and a lawn firm need

Your license covers the categories your certified applicator holds, and nothing else. COMAR 15.05.01.10 says "Each place of business performing pest control shall be licensed in those categories in which it operates."⁴ The categories are numbered in COMAR 15.05.01.08, with letters for subcategories, and MDA's category page lists the same set.^2,3 The ones that matter here:

So a typical new pest company starts with 7A and 7D, adds 7B before it sells a termite job, and adds 8 if it sells a mosquito program. A lawn treatment company starts with 3C and usually 3A. The first category is $75 and each additional main number is $25: 7A and 7D share the number 7, so a 7A and 7D applicator pays $75, and 3, 7 and 8 together is $125.¹ MDA's study manuals are listed by category on its forms and resources page (Core, Category 3, 7C, 7D and 8 among them).¹⁵

Insurance on file with MDA

The minimum is set in the regulation, and MDA wants the paper, not your word. COMAR 15.05.01.10 C requires liability insurance "with limits not less than" bodily injury of "$100,000 each person, $300,000 each occurrence" and property damage of "$15,000 each occurrence, $30,000 annual aggregate provision," with a certificate of insurance from a company licensed in Maryland, kept in force for the whole licensing period.⁴ MDA's page adds that "An original copy of the current Certificate of Insurance must be kept on file with MDA."¹

Those are floors, and low ones next to the policies contractors usually buy; a commercial customer or property manager may ask for far more. What to buy first and what it costs is in contractor insurance. Two things to ask the agent, in writing: whether the policy covers pesticide application, drift included (some liability policies carry a pollution exclusion, so get the answer on paper), and whether the certificate they send MDA names the business exactly as it appears on the license.

Owners elsewhere find the same order of operations. A Virginia owner: "we are still required to have an applicators license and a pesticide business license (which requires proof of insurance) to conduct business in the state" (r/PestControlIndustry, June 2025). And from an owner who sold his route after 26 years: "You cannot get insurance without at least a 7A, household category certificate" (r/pestcontrol, April 2026). Get the certificate first, then the insurance, then the license.

Certified applicators and registered employees

Getting certified

To be certified "an individual must be at least 18 years of age and have at least one year of practical pesticide application experience as a registered employee in the category(ies) in which they want to become certified." A degree in a biological field (biology, botany, horticulture, entomology, agronomy) or one of MDA's approved courses can stand in for the experience.¹ You apply at least a month before the exam with your experience forms or transcript. The exams are multiple choice and closed book: the Core exam plus at least one category exam, each passed with 70% or more. MDA runs the commercial exams every other month in Annapolis, Salisbury and Frederick.¹

The one-year rule is the catch for a new owner who has never worked as a registered employee. Without the year, the degree or an approved course, you need a certified applicator on staff before you can be licensed.

No renting a certificate

Some states let a business borrow a license. An Arizona newcomer wrote in September 2026: "they allow you to rent an operator license from someone who has one but isn't using it. I just did this" (r/PestControlIndustry). Maryland's rules point the other way. "A certificate, license, or permit issued under this chapter may not be transferred to any person," and the designated certified person "may not serve as the certified individual for more than one place of business."⁵ MDA's page adds that an individual can't keep certification "for more than one place of business at a time."¹ If your certified applicator leaves, the business tells MDA "immediately."⁵

Recertification every year

"A pesticide applicator's certificate is only valid for one year," and Maryland "requires all certified applicators ... to attend recertification training each year in order to renew their certificate." Category 1, 3, 7, 8, 9, 10 and 13 applicators need eight credits a year and categories 2, 5 and 6 need six, where one credit is half an hour. An applicator who doesn't show proof of the training "must retake the certification examinations by June 30."¹ The training doesn't have to be in Maryland, but the course must be approved by MDA.

Registered employees

This is the part a growing company misses. The business must make sure "each employee involved in pest control sales, service, or inspections completes a training program approved by MDA on pesticide use and safety," within 30 days of the license, of hire, or of a change in duties, and keep "written documentation" of it with the date.¹ The salesperson counts, not only the tech.

• Register each one with MDA on an I.D. Card Request Form with a 1 inch by 1 inch color photo and a $30 fee; renew every year by June 30 for $30. Certified applicators are exempt from the fee.
• The employee carries the MDA I.D. card and shows it on request. MDA tells homeowners to ask to see it.⁶
• Until the training is done, the employee may apply pesticides only when a certified applicator or a registered employee "is physically present at the time and place."
• Tell MDA in writing within 30 days when a registered employee leaves or changes jobs.¹

What hiring a first helper costs beyond the $30 (payroll tax, workers comp, the W-2 or 1099 question) is in how to hire your first employee.

The truck

"The pesticide business name and license number shall appear on each motor vehicle transporting pesticides or devices used in pest control," with the number preceded by "MDA," "In bold print not less than 2 inches high," and "Displayed on both sides of the vehicle."⁵ Each truck also needs the label for the product being applied at the place of application, the protective equipment the label calls for, and "an effective anti-siphon device or back-flow preventer on all hoses or lines used to fill or rinse" equipment. Any accident, fire, flood or spill gets a phone call to MDA immediately.⁵

What every customer gets in writing, the lawn sign, and the neighbors

The written information

"Whenever a pesticide is applied, or at the time a customer enters into a contract with a licensed pest control company, the customer must receive the following written information":⁶

• "Name of the pest control business."
• "Maryland pesticide business license number."
• "Telephone number of the business."
• "Maryland Poison Center telephone number." (It's 1-800-222-1222.)
• "Common name or active ingredient of the pesticide products applied."
• One of three: a copy of the label, the part of the label with the precautionary statements and environmental hazards, or "a document compiled by the pest control firm that contains appropriate health, safety, and environmental hazard information taken from the pesticide label and approved by the Maryland Department of Agriculture."^6,7

The first four never change, so put them on your agreement, your service ticket and your invoice once. The product changes by visit, so it goes on the ticket you leave each time. If you write your own summary sheet instead of handing over labels, MDA has to approve it before you use it.⁷ And "Upon the customer's request," the company has to give advance notice of an application.⁷ The service agreement template has a Maryland notice block with all six items as fields.

The lawn sign

"After a pesticide has been applied to a lawn or to exterior landscape plants, the pest control company must post a standardized sign at one or more specific locations on the property. The customer is requested to keep the sign in place for 48 hours after the application. (Note: Signs are not required for fertilizer applications.)"⁶ COMAR 15.05.01.15 applies the rule to category 3 licensees and sets the sign: 4 inches by 5, sturdy and weather resistant, rigid rather than a flag, black bold letters on yellow, the standard front, and the date, your business name and your phone on the back in at least 18-point type. The bottom sits 12 to 16 inches above the soil, at each primary access to the property, or at the treated spot for a spot treatment.⁷ Buy them before your first lawn round.

Pesticide-sensitive neighbors

"individuals who have registered with MDA as a pesticide sensitive individual must receive prior notification of pesticide applications made to lawn and ornamental plants on neighboring properties."⁶ MDA sends the list "by February 15 of each year" to category 3 and category 8 licensees. Before you treat a property next to a registered person, you notify them "By telephone the day before, or the morning of, a planned pesticide application," or in person or with a written notice delivered to their home before you apply.⁷ Match the list against your route each spring.

Records

Keep a record of "each pest identification, pesticide recommendation, or pesticide application" for two years, available to MDA on request: the applicator, the date, the site and pest, the area treated, the address, the owner or tenant, the product's common name and EPA registration number, the rate and concentration, the total used, the equipment, the time of day, and the wind direction and speed (not needed for baits in stations or applications in or within 3 feet of a structure).⁸

Lawn companies: the fertilizer certificate and license, and the fall cutoff

Fertilizer is regulated separately, by MDA's Nutrient Management Program. "The Fertilizer Use Act of 2011 requires individuals who, as part of their job, apply fertilizer to turf on non-agricultural land, be certified or work under the direct supervision of someone who is certified, and that businesses that employ certified fertilizer applicators must be licensed."¹⁰ A lawn company spraying weed control and fertilizing turf holds two business licenses, with two numbers.

Sources for the table.^10,11 The 2026 exam application lists one more date this year: Annapolis on December 3, 2026, with a review session at 9:00 and the exam at noon.¹⁰ If you're licensed now and want to fertilize next spring, that's the seat to book.

The fall cutoff for professionals

MDA's homeowner page says "Do not apply lawn fertilizer between November 16 and March 1."⁹ That's the homeowner rule. For professionals, COMAR 15.20.10.09 D says a certified applicator or trained employee "shall apply nitrogen or phosphorus to turf only from March 1 through November 15 of any calendar year," and "From November 16 through December 1" may apply "up to 0.5 pounds per 1,000 square feet of water-soluble nitrogen."¹¹ Never on frozen ground, never on pavement, and not within 15 feet of water (10 feet with a drop spreader, a rotary spreader with a deflector, or a targeted spray).¹¹ Plan your last round for mid-November.

Owners in other states describe the same two-license setup. "In my state you can apply fertilizer, but for weed or pest control you must have certification and carry insurance" (r/LawnCarePros, November 2024). From New Jersey: "i need two licenses a fertilizer and pesticide for the weed control" (November 2024). How to price the rounds is in lawn care pricing.

Montgomery County's lawn pesticide law

Montgomery County Bill 52-14 prohibits "the use of certain pesticides on lawns," on playgrounds and on children's facilities. Lawn care companies sued, and in May 2019 the Court of Special Appeals held that the ordinance "does not run afoul of State law."¹³ The county's page puts the rule today in one line: "Only organic or minimum-risk pesticides are allowed for use on lawns, playgrounds, mulched recreation areas, and childcare facilities. Some exemptions apply."¹²

On private property the exemptions are limited to biting or stinging insects or plants, disease vectors, organisms that threaten trees or shrubs, state noxious weeds, four invasive plants the county adopted, indoor pests treated around or near the foundation, and an outbreak that threatens human health or significant economic damage. Use a banned product under that last one and you "MUST" notify the county's Department of Environmental Protection within seven days. Golf courses and agricultural operations are exempt, and Laytonsville has not opted in.¹² The county also says its signage rule matches the state's: signs posted right after a lawn application, left up 48 hours.¹²

What this means for a route: price Montgomery County lawns as an organic program, read the county's current allowed list before you name a product in a quote, and keep perimeter pest work around the foundation in its own line, since that's an exemption.

Landscape installs and tree work

The pesticide license doesn't cover building anything. The Maryland Home Improvement Commission's FAQ: "While landscape contractors are licensed by MHIC, the Maryland Department of Natural Resources is responsible for licensing tree experts. A tree expert's work includes trimming, pruning, thinning, cabling, shaping, removing, or reducing the crown of trees that are 20 feet or more in height."¹⁴ A lawn firm that also plants beds or lays a patio needs the MHIC license; one that prunes tall trees needs the tree expert license. Neither replaces the pesticide license, and the pesticide license doesn't replace them.

Your first 30 days: a checklist for a new Maryland pesticide business

This is the same list as the printable. Week 1 keeps you legal on the next job. The rest is the paperwork an MDA inspector or a customer's complaint would ask for first.

Week 1: licenses and paperwork

1. Look up your business on MDA's licensed pesticide business search. Write down the license number, the categories and the June 30 expiry.¹
2. Check that a certified applicator is designated for every category you sell: 7A for household pests, 7D for rodents, 7B before any termite job, 3A and 3C for beds and lawns, 8 for mosquitoes.^3,5
3. Confirm MDA has a current certificate of insurance showing at least $100,000 and $300,000 bodily injury and $15,000 and $30,000 property damage.⁴
4. Letter every vehicle that carries pesticides: business name and "MDA" plus the license number, at least 2 inches high, both sides.⁵
5. Lawn firms that fertilize: apply for the PFA certificate ($100) and the fertilizer business license ($50), and book the exam (Annapolis, December 3, 2026). Put "MDA" and the fertilizer license number on service vehicles too.^10,11
6. Landscape installs: MHIC license. Trees 20 feet or taller: DNR tree expert license.¹⁴
7. Put the license number and the other fixed written-information items into your agreement, service ticket and invoice.⁶

Week 2: people

8. Train every employee in sales, service or inspections with an MDA-approved program within 30 days, and keep the dated record.¹
9. Register each one ($30, photo, I.D. Card Request Form). Until trained, they apply only with a certified applicator or registered employee present.¹
10. Fertilizer trained employees: document the training, then register them ($15 each).¹¹
11. Stock every truck with labels, the PPE the labels require, and an anti-siphon device on fill hoses. Save MDA's number for spills: 410-841-5710.⁵

Weeks 3 and 4: customers, records and local rules

12. Hand over the written information at signing and at every application, with the label or approved precautions.⁷
13. Order the standard lawn signs if you hold category 3, and get the pesticide-sensitive list.⁷
14. Set up your application record (two years) and, for fertilizer, the three-year record.^8,11
15. Book the last fertilizer round of the year before November 16, or keep it to 0.5 lb of water-soluble nitrogen through December 1.¹¹
16. For Montgomery County lawns, build an organic program and read the county's allowed list.¹²

On the calendar

17. By February 15: the pesticide-sensitive list arrives (category 3 and 8).⁷
18. March 1: fertilizer annual report to MDA.¹¹
19. Through the year: recertification credits for each certified applicator (eight or six, by category).¹
20. June 30: pesticide business license renewal, with every applicator's certificate and each registered employee at $30.¹
21. December 31: PFA certificate (2 hours of training, $100) and fertilizer business license renewal.¹¹
22. Your insurance renewal date, so the certificate on file with MDA never lapses.⁴

More for new pest control and lawn companies

• Pest control pricing: what to charge for quarterly, bi-monthly and monthly service, and the first visit, with a free price sheet.
• Pest control service agreement template: visit schedule, callbacks, cancellation, and a Maryland notice block.
• Lawn care pricing: mowing, fertilizer and weed control, and the season price.
• Landscaping maintenance agreement template: seasonal scope, the skip-visit rule and monthly card billing.
• Contractor insurance: what to buy first and what it costs.
• How to hire your first employee: W-2 or 1099, workers comp and what a helper really costs.

Where Deepsel fits

Deepsel is the field service software I build, and it doesn't know Maryland pesticide law. It won't post your lawn sign, call the sensitive neighbor, or keep the chemical application log in COMAR 15.05.01.12; there are no chemical application logs, route optimization or device tracking in it, so keep that record in your own sheet or a pest-specific tool (the ones that keep it are compared in pest control software for small business). Two parts of it help with what's above. The shop-wide terms text you set once is copied onto every new quote, and the invoice footer is copied onto every invoice, so your business name, Maryland license number, phone and the Maryland Poison Center number go on every document without retyping. And on Pro, the service plans module runs the recurring book: a quarterly pest plan or an eight-round lawn program is a plan with a ledger of visits owed against visits delivered, renewals charge the card on file or go out as a scheduled invoice, a failed card retries and, if it still fails, the office gets a flag, and the customer gets an email reminder when a covered visit comes due, on wording and a schedule you approve. Free covers 30 estimates and 30 invoices a month for your whole team; Pro is $29 a month with unlimited estimates and invoices (pricing).

Frequently asked questions

Do I need a pesticide business license in Maryland?

Yes, if your business applies or recommends any pesticide for hire. MDA's definition of pest control covers household pest work and, in its own words, "lawn care companies using weed and feed or organic pesticides, landscapers using Roundup or animal repellents." The license is $150 a year and needs at least one certified applicator in each category you work in, plus liability insurance on file with MDA. A lawn company that only fertilizes needs the fertilizer certificate and license instead; one that sprays weeds needs both.

How much does a Maryland pesticide business license cost?

The business license is $150 a year, July 1 to June 30. The applicator's certificate is $75 for the first main category and $25 for each additional one, plus a $10 fee for each exam you retake. Each registered employee costs $30 a year. On top of that is the insurance: bodily injury of $100,000 each person and $300,000 each occurrence, and property damage of $15,000 each occurrence with a $30,000 annual aggregate.

How do I get a pesticide applicator license in Maryland?

Be 18 or older and have one year of practical experience as a registered employee in the category, or a degree in a biological field, or one of MDA's approved courses. Apply to MDA at least a month before an exam with your experience forms or transcript, then pass the Core exam and at least one category exam with 70% or more. MDA runs the commercial exams every other month in Annapolis, Salisbury and Frederick.

Can I use someone else's certification to license my business?

Not the way some other states allow. In Maryland a certificate can't be transferred, a person can hold certification for only one place of business at a time, and the designated certified applicator can't serve more than one place of business. If your certified applicator leaves, you tell MDA immediately, and you can't keep working in that category until someone else on staff is certified in it.

When can lawn companies fertilize in Maryland?

A professional fertilizer applicator may put nitrogen or phosphorus on turf from March 1 through November 15. From November 16 through December 1 the limit is 0.5 pound of water-soluble nitrogen per 1,000 square feet. Never on frozen ground, and not within 15 feet of water (10 feet with a drop spreader, a rotary spreader with a deflector or a targeted spray). The November 16 to March 1 blackout you see on MDA's homeowner page is the rule for people fertilizing their own lawn.

Can I spray lawns in Montgomery County?

Only with organic or minimum-risk pesticides on lawns, playgrounds, mulched recreation areas and child care facilities, apart from the county's exemptions: biting or stinging insects, disease vectors, pests that threaten trees or shrubs, state noxious weeds, four listed invasive plants, indoor pests treated around the foundation, and outbreaks that threaten health or cause significant economic damage. Use a banned product under that last exemption and you notify the county's Department of Environmental Protection within seven days.

Sources

1. Maryland Department of Agriculture, "Pesticide Business Licensing & Certification" (the page MDA's old licensing_and_certification.aspx address now opens): definition of pest control, including "lawn care companies using weed and feed or organic pesticides, landscapers using Roundup or animal repellents"; "A pesticide business license is required in order to provide these services"; designate a certified applicator per category; "$150 annual business license fee"; insurance limits; "An original copy of the current Certificate of Insurance must be kept on file with MDA"; "The licensing period runs from July 1 through June 30"; certification at 18 with "one year of practical pesticide application experience as a registered employee," a degree or approved course in lieu; exams every other month in Annapolis, Salisbury and Frederick, Core plus a category at 70%; $75 and $25 fees, $10 retake; one place of business at a time; recertification credits by category and retaking exams by June 30; "A pesticide applicator's certificate is only valid for one year"; consultant and not-for-hire licenses; registered employee training within 30 days, written documentation, $30 registration and renewal, 30-day termination notice. mda.maryland.gov, read November 8, 2026.
2. Maryland Department of Agriculture, "Pest Control Categories" (Turf "e.g., weed, insect or disease control to lawns"; Wildlife Control not required "if strictly performing trapping and removal," which needs a DNR Wildlife Damage Control Operators Permit). mda.maryland.gov, read November 8, 2026.
3. COMAR 15.05.01.08 A, categories and subcategories of pest control: (3) Ornamental or Turf, (a) to (c); (6) Right-of-Way and Weed; (7) Industrial, Institutional, Structural, and Health Related, (a) general pest control, (b) wood destroying insects, (c) wildlife, (d) rodent, (e) fumigation; (8) Public Health. regs.maryland.gov, read November 8, 2026.
4. COMAR 15.05.01.10, Licenses: "Each place of business performing pest control shall be licensed in those categories in which it operates"; $150 fee; insurance limits (C)(1)(a) and (b) and certificate of insurance (C)(2); pesticide business license "valid beginning July 1, or whenever obtained, to June 30"; $30 late fee. regs.maryland.gov, read November 8, 2026.
5. COMAR 15.05.01.03: B, certificates and licenses "may not be transferred to any person"; C, anti-siphon device, protective equipment, immediate notice of accidents and spills, label at the time and place of application; E(1), the designated person "may not serve as the certified individual for more than one place of business," E(2), notify MDA immediately when a certified applicator leaves; F, vehicle identification, "MDA," 2 inches, both sides. regs.maryland.gov, read November 8, 2026.
6. Maryland Department of Agriculture, "Hiring a Pest Control Service": the written information list ("Whenever a pesticide is applied, or at the time a customer enters into a contract..."); the lawn sign and 48 hours; "individuals who have registered with MDA as a pesticide sensitive individual must receive prior notification"; ID cards for sales and service employees. mda.maryland.gov, read November 8, 2026.
7. COMAR 15.05.01.15 (posting of sign: category 3 licensees; size, color, back of sign, 12 to 16 inches, primary access or spot; 48 hours), 15.05.01.16 (pesticide information for customer; Department approval of summaries; advance notice "Upon the customer's request") and 15.05.01.17 (pesticide sensitive individuals: list distributed "by February 15 of each year" to category 3 and 8 licensees; notice by phone the day before or the morning of, or in person or in writing before application). .15, .16, .17, read November 8, 2026.
8. COMAR 15.05.01.12, Records: two years; the fields A to L, including the wind exception for baits in bait stations and applications in or within 3 feet of a structure. regs.maryland.gov, read November 8, 2026.
9. Maryland Department of Agriculture, "Lawn Fertilizer Guide for Homeowners & Residents" (the page MDA's old fertilizer.aspx address now opens): "Do not apply lawn fertilizer between November 16 and March 1," under "If you're applying fertilizer yourself"; hire certified and licensed professionals. mda.maryland.gov, read November 8, 2026.
10. Maryland Department of Agriculture, "Application for Professional Fertilizer Applicator (PFA) Certification Exam 2026" (revised 12/2024): the Fertilizer Use Act of 2011 sentence; certification fee $100; business license $50; "Certification and business licenses expire December 31 of each year"; 50 questions, 70% to pass; 2026 exam dates including Annapolis, December 3, 2026. mda.maryland.gov (PDF), read November 8, 2026.
11. COMAR 15.20.10, Fertilizer Application Requirements for Land Not Used for Agricultural Purposes: .03 (certification requirement), .05 (PFA certificate: $100 and an exam; annual recertification with 2 hours of continuing education and $100; valid to December 31; $30 late fee), .07 (business license: $50, designated PFA, "MDA" and the license number on service vehicles, valid to December 31), .08 (trained employees, $15, training documented before registration), .09 (application rules; D(1) "only from March 1 through November 15," D(2) "From November 16 through December 1... up to 0.5 pounds per 1,000 square feet of water-soluble nitrogen"; frozen ground; 15 and 10 feet from water), .13 (records kept 3 years) and .14 (annual report by March 1). regs.maryland.gov, read November 8, 2026.
12. Montgomery County Department of Environmental Protection, "Pesticide Law" ("Only organic or minimum-risk pesticides are allowed for use on lawns, playgrounds, mulched recreation areas, and childcare facilities. Some exemptions apply."), montgomerycountymd.gov; "Exemptions to the Pesticide Law" (private property exemptions, the 7-day notice to DEP, golf courses and agriculture exempt, Laytonsville not opted in), montgomerycountymd.gov; "Signage Requirements for Pesticide Applications," montgomerycountymd.gov. All read November 8, 2026.
13. Montgomery County, "Maryland Court of Special Appeals Upholds Montgomery County's Restrictions on Lawn Pesticide Use," May 3, 2019 (Bill 52-14's provisions; the court's conclusion that "the ordinance does not run afoul of State law"). montgomerycountymd.gov, read November 8, 2026.
14. Maryland Home Improvement Commission, FAQ, "Tree Cutters": "While landscape contractors are licensed by MHIC, the Maryland Department of Natural Resources is responsible for licensing tree experts," with the 20-foot definition. dllr.state.md.us, read November 8, 2026.
15. Maryland Department of Agriculture, "Pesticide Applicator Forms & Resources" (Pesticide Business License Application, I.D. and termination forms, Pesticide Sensitive Individual Registration, training manuals by category), mda.maryland.gov; licensed pesticide business search, egov.maryland.gov. Read November 8, 2026.
16. Reddit, owner and newcomer comments quoted above, each checked live on November 8, 2026: nd7ge3d and nd9uvkz (September 9, 2025); p88c59y (Arizona, September 6, 2026); mzchdpg (Virginia, June 23, 2025); ogjts9b (April 16, 2026); lxpom5i (November 18, 2024); lyw4s1o (New Jersey, November 25, 2024).