INLA Initial Certification Test Registration

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What is the Indiana Accredited Horticulturist Program?

The Indiana Nursery and Landscape Association have developed the Indiana Accredited Horticulturist Program to provide a method of self-study and accreditation for individuals in the nursery industry. The goal of this certification and accreditation program is to develop knowledgeable, motivated, professional employees for the landscape nursery industry.

There are over 700 Indiana Accredited Horticulturists and over 125 Master Horticulturists. The success of the program and the upgrading of the personnel in the nursery industry are direct results of the emphasis the Indiana Nursery and Landscape Association have placed on education programs. You are encouraged to take advantage of this valued educational service of your association.

REGISTRATION FOR THE IAH EXAM: Please complete the IAH Certification Registration form on this page (below the pull down menus) and submit your registration fees to INLA. Please note: You must register and pay the fee in order to take the exam. If you do not wish to register on-line, click here to download a pdf version of the IAH application and mail it with your payment.

Upcoming exams are listed in the last pull down menu (below) or on our Upcoming Events Page.

Study Material

The IAH study material is now available by clicking on or copying and pasting the following link:

All you need do is fill out the online training manual registration form and you will have access to view the most updated study material. If you decide to become certified, you must register and pay the enrollment fee, which you can access by scrolling below the pull down menus and complete the online application or mail or fax the print registration form.

The IAH study material consists of basic information on plant growth and development, plant maintenance and pest control. Additional information covering turf establishment and maintenance, landscape plans and specifications, and soil characteristics has been included. The study material, which now includes fifteen chapters, have all been authored by college professors from Purdue and other universities. The latest additions include, Chapter 14, “The Garden Center Employee; Chapter 15, “Diagnosing Plant Health Problems” and a complete update of Chapter 9, “Ornamental Plant Pathogen Biology and Management.”

Taking the Exam

Once you have paid the registration fee, the individual will be eligible to take the examination to determine the level of mastery of the study of materials. A certificate and Indiana Accredited Horticulturist logo patch will be presented to those individuals who achieve a grade of 80% or more. An individual who passes the exam is recognized in the Indiana Nursery & Landscape News as an Indiana Accredited Horticulturist.

An Indiana Master Horticulturist program has been developed to recognize the Accredited Horticulturist who wants to continue his or her professional development in the industry. This program involves the further investigation of the IAH study material and passing an essay exam with a grade of 90%.

The Cost of the Program

The cost of the program is $95.00 for members of the Indiana Nursery and Landscape Association. Non-member rates are $145.00 per registration. The cost includes test (one time), certificate, and one logo patch or pin for company uniforms.

You must register and pay the fee in order to take the exam. You can register online — see form below. If you do not wish to register on-line, click here to download a pdf version of the IAH registration form to mail in or fax.

Need more info before you sign up, click here for Frequently Asked Questions (FAQ)

There is a retest fee of $15.00 (member) and $25.00 (non-member). Prices subject to change without notice.

Additional Self-Study Guides

Chapter outlines courtesy of George Brenn, IAH Chair

IAH Geo Brenn Study Guides - Select study guides here
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Chapter 10
Chapter 11
Chapter 12
Chapter 13
Chapter 14
Chapter 15

Plant Identification List

Maintaining Your Certification/Re-certification

Once you have become certified, it is your responsibility to maintain your certification and keep it current through continuing education. The INLA will update our “Active Status” list below periodically throughout the year.

Active Status: Check this list to review your recertification date and current CEU status. List includes Active and recently expired certifications. IAH Certified List (as of 9/28/21)

In-Active Status: If in-active this means your certification has expired. Please contact the INLA office at 800.443.7336 or email

Recertification – your recertification date is included on your most recent certificate.

•  If you are due to recertify, you must complete the IAH CEU Recertification form CLICK HERE

•  Mail the completed form with your payment of $25 (member) or $45 (non-member) to the INLA office by your recertification date. This MUST included seven (7) hours of continuing education over a two year period.

•  If your certification has lapsed for less than two (2) years, you will not need to retest but must have seven (7) hours of continuing education within the lsat two (2) years.

•  If you have attended INLA educational programs, we will have your information; however, you must list it on the CEU tracking / recertification form and include your recertification fee

•  If you wish to attend non-INLA educational programming we require a Continuing Education Course Approval Application (click here) to be submitted at least 14 days prior to the program, proff of attendance/registration (see list of examples below).

•  If your certification has lapsed for two (2) + years, you must retest. A retest fee of $50 will apply.

•  The most up-to-date study material is available (free) at:

•  After you recertify you will receive a new / current certificate, logo patch and logo sheet to use for marketing purposes along with the latest CD if not previously provided.


IAH Upcoming Review and Exam Opportunities

Upcoming IAH Exams

–> January 17 at the Indiana Green Expo, Indiana Convention Center in Indianapolis, Indiana

Questions? Contact Rick Haggard or Julie Gillen, or call 800-443-7336.

REGISTRATION FOR ANY EXAM: Please complete the online registration form below and submit your registration fees to INLA. You must register and pay the fee in order to take the exam.

If you prefer to register by mail/fax, download the pdf associated with the test (if provided) or use the generic Mail-in/fax registration form and be sure to indicate which test you want to attend.

REQUIRED:  IAH program registrations for certification must be purchased through the INLA for an additional fee. The certification fee is $95.00 for INLA members and $145.00 for nonmembers. This is in addition to registering to take this exam.

Continuing Education – Approved Programs

Indiana Green Expo – January of each year
INLA Summer Meeting – July / August of each year
INLA Magazine – each issue features a quiz – earn a .5 credit per issue

The following organizations may offer approved programs. If so, they will have the appropriate sign in sheets submitted by the IAH Certification Chair.


Chicago Botanic Garden

Gabis Arboretum at Purdue Northwest, Valparaiso

Indiana Arborists Association (IAA)

Indiana Professional Lawn & Landscape Association (IPLLA)

Indianapolis Landscape Association (ILA)

Midwest Regional Turf Foundation

National Association of Landscape Professionals (NALP)

Northwestern Indiana Nursery & Landscape Assn. (NWINLA) Annual Meeting (usually held in March)

Purdue Extension Web-based Programs

Tree Care Industry Association

Additional programs may be submitted for approval – contact Rick Haggard,, 800-443-7336

IAH Certification Registration

Complete this online form to register to take the IAH test. Online payment is not available at this time so INLA will contact you for your payment after you submit the form. If you do not wish to register on-line, download a pdf version of the IAH registration form (link above).

  • Professional Certification

    Currently employed in the Green industry
    You must register to take the IAH exam. Study material is free at
    Certified individual must submit (via CEU forms) 7 hours of Continuing Education Units per two year certification period OR must re-test. CEU programs must be pre-approved by IAH Committee. Please note that CEU program costs will vary.
    Contact the INLA Office for further information
    If you paid for a registration but the person could not take the test, the registration can be transferred to another individual.
  • Non-Commercial Certification

    An individual not currently employed in the green industry.
    Registration of individual not currently employed in the green industry.
  • Personal Information and Payment

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IAH Bimonthly Quiz

March / April 2024

The IAH bimonthly quiz can be completed by Active (current) IAH certified — initial or masters.

Each quiz is worth a 0.5 CEU (one-half CEU). 

Submission Deadline:
April 30