- What the Certified Grounds Manager Credential Actually Is
- The Two-Stage Path: Exam First, Portfolio Second
- Eligibility: Degree, Years, and Supervisory Experience
- Exam Format and Scoring Facts
- The Seven Preparation Subjects
- The PGME Portfolio Is Not the Exam
- Fees and Registration Mechanics
- Sequencing Your Preparation Around the Subjects
- Maintaining the Credential
- Who Benefits From the Credential
- Frequently Asked Questions
- The Certified Grounds Manager exam is administered online by the Professional Grounds Management Society (PGMS) with an approved proctor.
- The initial exam has 75 multiple-choice and true/false questions in 90 minutes, and 80% is required to pass.
- Passing the exam is only stage one; a separately graded PGME portfolio and mentorship follow.
- Seven illustrative subjects, from Soils to Turf grasses, guide preparation but are not a weighted blueprint.
What the Certified Grounds Manager Credential Actually Is
The Certified Grounds Manager credential is a professional designation for people who run grounds operations: campuses, parks, corporate properties, athletic facilities, and similar landscapes. It is awarded through the Professional Grounds Management Society (PGMS), and it measures applied knowledge rather than trivia. If you have searched for "CGM" and landed on unrelated credentials with the same acronym, note that this article covers only the PGMS grounds-management designation. For a plain-language orientation, see our explainer What Is CGM Certification?.
What sets this credential apart from a typical multiple-choice licensing test is that the exam is only half the journey. PGMS pairs a knowledge exam with a portfolio-based evaluation, so candidates demonstrate both what they know and what they have actually managed. That structure shapes everything about how you should plan: your time, your documentation habits, and even your choice of mentor.
The Two-Stage Path: Exam First, Portfolio Second
The process unfolds in sequence. First you sit the online application exam, proctored by an approved proctor. After you pass, you move on to the PGME portfolio, which is graded separately against a rubric. The initial testing window runs 30 days, while the portfolio is due within one year, and the portfolio stage involves mentorship and evidence submission.
Each stage tests a different skill:
- The exam checks that your technical knowledge across turf, soils, irrigation, plant health, chemicals, and management is sound.
- The portfolio checks that you can document real management work, organize evidence, and present it so a reviewer can score it against the rubric.
Eligibility: Degree, Years, and Supervisory Experience
Eligibility is built around a combination of education and experience, and you must also have at least one year at your current facility. PGMS offers three tracks, each trading formal education against hands-on years:
| Education Background | Grounds Experience | Supervisory Experience |
|---|---|---|
| Relevant four-year degree | 4 years | 2 years |
| Two-year degree | 6 years | 3 years |
| No qualifying degree | 8 years | 4 years |
The practical takeaway is that the credential is open to people who built their careers on the job as well as those with a degree. If you are unsure which track fits you, our detailed breakdown in CGM Requirements: Eligibility, Prerequisites & How to Qualify walks through how to document your experience. Keep employment records and supervisory titles handy before you apply.
Exam Format and Scoring Facts
The application exam is deliberately compact. Here is what is established:
- Length: 75 questions
- Time: 90 minutes
- Question types: multiple-choice and true/false
- Passing threshold: 80%
- Delivery: online, with an approved proctor
At 75 questions in 90 minutes, you have roughly a minute and a bit per item, which is comfortable for recall questions and tighter for scenario items that ask you to choose a management decision. PGMS has not published how the 75 questions split between scored and unscored items, so do not assume every question counts the same way. With an 80% cut score, you can afford only a limited number of misses, which is why broad coverage matters more than deep expertise in one area. We unpack the math and what it implies for your margin in CGM Passing Score: Exactly What You Need to Pass.
Because the pass rate is not publicly disclosed, any specific percentage you see quoted elsewhere should be treated with suspicion. For what can honestly be said, read CGM Pass Rate: What the Data Shows, and for a candid look at difficulty, How Hard Is the CGM Exam?
The Seven Preparation Subjects
The PGMS handbook lists seven illustrative subjects for the application exam. These are useful as preparation headings, but they are unweighted and should not be mistaken for a complete, weighted blueprint. No dated current blueprint is published, no largest-domain weight is stated, and the official handbook carries 2022 annotations. Treat the list below as a study map, not a scoring formula. For a deeper treatment of each area, see CGM Exam Domains: Complete Guide to All 7 Content Areas.
Chemical and Fertilizers
Grounds managers handle fertilizers, herbicides, fungicides, and insecticides, so expect questions about safe, effective, and compliant use.
- Reading and interpreting product labels and fertilizer analyses
- Application timing, rates, and calibration concepts
- Safety, storage, and handling responsibilities
Insects and Disease
This subject centers on diagnosing problems in turf and woody plants and responding sensibly.
- Recognizing common pest and disease symptoms
- Integrated approaches that weigh cultural, biological, and chemical options
- Distinguishing biotic problems from environmental stress
Irrigation
Water is a major cost and a major risk on managed landscapes.
- System components, scheduling, and efficiency
- Diagnosing coverage problems and overwatering or underwatering
- Water conservation as a management practice
Management
This is where grounds expertise meets leadership, and it reflects the supervisory experience the credential requires.
- Budgeting, scheduling, and resource planning
- Staff supervision and communication
- Policies, safety, and documenting operations
Soils
Soil underpins nearly every other subject, so weaknesses here tend to ripple outward.
- Texture, structure, pH, and fertility concepts
- Drainage and compaction and how to address them
- Interpreting soil test information
Trees and Shrubs
Woody plants require different judgment than turf, from selection to pruning to long-term care.
- Planting, pruning, and maintenance principles
- Identifying common problems and stress factors
- Matching plants to site conditions
Turf Grasses
Turf is the backbone of many grounds programs, and questions often span species, culture, and problem solving.
- Warm-season versus cool-season characteristics
- Mowing, fertility, aeration, and renovation practices
- Diagnosing thin, discolored, or failing turf
Because the subjects are described as illustrative rather than exhaustive, expect adjacent topics to appear. The safest approach is to study the seven headings thoroughly and then read widely within each. Our CGM Study Guide: How to Pass on Your First Attempt and the quick-reference CGM Cheat Sheet help you organize that review.
The PGME Portfolio Is Not the Exam
One of the most common sources of confusion is mixing up the exam subjects with the portfolio. The PGME portfolio has its own nine categories, and these are portfolio categories, not exam domains. Do not study them as if they were exam content, and do not expect the exam to follow their layout.
The portfolio is graded separately using a rubric, and PGMS does not publicly disclose its pass rate. What you submit is evidence of real work, supported by mentorship. Practical implications:
- Choose projects you can document thoroughly, with before-and-after records.
- Line up a mentor early so feedback arrives well before your one-year deadline.
- Read the rubric language in the handbook and write your submissions to it.
Key Takeaway
Treat the exam as a knowledge gate and the portfolio as a proof-of-practice project. Keep a running folder of evidence while you study so the portfolio does not become a second full-time job after you pass.
Fees and Registration Mechanics
Costs depend on your PGMS membership status:
| Item | Amount |
|---|---|
| Application, PGMS member | $200 |
| Application, non-member | $300 |
| Join PGMS and apply | $400 |
| Retest | $50 |
| Renewal, every three years | $75, reduced by $25 per member year |
Notice the math on membership: the non-member fee is $100 above the member fee, while the join-and-apply bundle is $200 above it. If you plan to maintain the credential long term, the renewal discount of $25 per member year also rewards staying a member. For the full picture, including what is and is not included, see CGM Certification Cost: Complete Pricing Breakdown. The low $50 retest fee softens the risk of a first-attempt miss, though it should not replace solid preparation. Timing details are covered in CGM Exam Dates: Testing Windows, Deadlines & Scheduling.
Sequencing Your Preparation Around the Subjects
You do not need a generic study system here. What helps is ordering the seven subjects so that foundations come first. Soils feed into turf, trees and shrubs, irrigation, and fertilizer decisions, so learn them early. Management is broad and judgment-heavy, so revisit it repeatedly rather than cramming it once. A sample sequence for a six-week lead-up before your 30-day testing window:
Foundations
- Soils: texture, pH, drainage, compaction, fertility
- Irrigation: components, scheduling, efficiency
Plant Systems
- Turf grasses: species, culture, renovation
- Trees and shrubs: selection, pruning, care
Protection and Inputs
- Insects and disease: diagnosis and response
- Chemical and fertilizers: labels, rates, safety
Integration
- Management: budgeting, supervision, operations
- Timed run-throughs of 75-question sets in 90 minutes
Because the application exam is 75 questions in 90 minutes with an 80% bar, finish by practicing under realistic timing. You can do that with the questions on our CGM practice test site, and the CGM training overview covers other learning formats to pair with it.
Maintaining the Credential
Certification is not permanent. You renew every three years by earning 25 continuing education units (CEUs), with at least 80% of them approved by PGMS. That means roughly 20 of the 25 CEUs must come from PGMS-approved activities, so plan your professional development around approved offerings rather than collecting random credits. The renewal fee is $75, reduced by $25 for each year you have been a PGMS member, which is another reason continuous membership can pay off.
Spread your CEUs across the three years instead of hunting for them in the final months. Track certificates as you go, in the same folder habit you will use for portfolio evidence.
Who Benefits From the Credential
The credential tends to suit professionals who oversee grounds operations, such as grounds supervisors, superintendents, facilities and campus landscape managers, and municipal or institutional grounds leaders. It signals documented technical knowledge and demonstrated management experience, which can matter when you are competing for leadership roles or negotiating responsibilities. Earnings and demand vary by region, employer type, and scope of responsibility, and we avoid quoting specific figures here; for a measured discussion, see CGM Salary Guide: Complete Earnings Analysis, CGM Jobs, and Is the CGM Certification Worth It?
Frequently Asked Questions
The initial application exam has 75 questions in a mix of multiple-choice and true/false formats, to be completed in 90 minutes. PGMS has not published how many of the 75 are scored versus unscored.
You need 80% on the exam. The PGME portfolio that follows is graded separately using a rubric, and its pass rate is not publicly disclosed.
No. The handbook lists seven illustrative subjects (Chemical and Fertilizers, Insects and disease, Irrigation, Management, Soils, Trees and shrubs, and Turf grasses) as preparation headings. They are unweighted and not presented as a complete blueprint, and no largest-domain weight is published.
The application costs $200 for PGMS members, $300 for non-members, or $400 to join and apply together. A retest costs $50, and renewal is $75 less $25 per member year.
Certification renews every three years. You need 25 CEUs, with at least 80% approved by PGMS, plus the renewal fee described above.
Whether you are a degreed horticulturist or a career grounds professional who earned your expertise in the field, the path is the same: pass the 75-question exam, document your practice in the PGME portfolio, and keep your credential current through approved continuing education. Start with the study guide and build from there.