INLA — Indiana Nursery & Landscape Association Join the INLA

Certifications

Indiana
Accredited
Horticulturist.

The IAH credential is the gold standard for horticulture knowledge in Indiana — over 700 certified professionals and 125+ Master Horticulturists.

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Indiana Accredited Horticulturist Badge

Program overview

About the program.

A self-study accreditation program developed by INLA, state-certified and recognized by the Great Lakes Alliance of nursery and landscape associations.

IAH

Initial
Certification

  • Multiple-choice exam covering 15 horticultural chapters
  • 80% or higher pass rate earns your certificate and logo patch
  • Members $95 · Non-members $145
View pricing
Master

Master
Horticulturist

  • Essay-format exam for current IAH holders seeking the elite credential
  • 90% or higher pass rate required
  • Recognized across the Great Lakes region
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700+

Certified
Statewide

  • Growing every season across Indiana
  • Professionals from nurseries, landscapes, garden centers, and municipal parks
  • A credential employers trust and customers recognize
Join INLA

Prepare

Prepare for
your exam.

The IAH exam draws from 15 study chapters developed in partnership with Purdue University, covering the full breadth of horticulture knowledge.

Study Chapters

1. Plant Growth & Development

9. Pruning

2. Soils & Plant Nutrition

10. Plant Identification

3. Plant Propagation

11. Landscape Plans & Design

4. Plant Maintenance

12. Landscape Installation

5. Insect & Disease Control

13. Irrigation Systems

6. Weed Control

14. Interior Plantscaping

7. Pest Control & Pesticides

15. Business Practices

8. Turf Management

Resources

Purdue

IAH Study Portal

Access all 15 study chapters online through Purdue University's dedicated IAH preparation portal.

Visit Purdue portal →
Study guide

George Brenn Study Guides

Comprehensive study guides compiled by George Brenn are available for purchase through the INLA office. Contact us to order.

Contact INLA →

Pricing

Registration
& fees.

INLA members receive discounted rates on all certification fees. Not a member yet? Join today and save.

Fee Type Members Non-Members
Initial Registration $95 $145
Retest $15 $25
Recertification (2-year) $25 $45
Reinstatement $50 $50
Reciprocity / Transfer $50 $60
Transfer of Registration (non-tested) $10 $20
Magazine Subscription (50% off) $18 $18
Student / FFA $50 $50

Continuing education

Maintaining your
certification.

Keep your IAH credential active by earning continuing education units on a two-year cycle.

7 CEU hours per 2-year period

CEU credit is available through INLA-approved programs including Indiana Green Expo sessions, Purdue field days, industry workshops, and other qualifying education events.

If your certification lapses, you may reinstate by paying the reinstatement fee and completing outstanding CEU requirements. Certifications lapsed more than two renewal periods require re-examination.

Downloads & Forms

Continuing education

Approved CE
programs.

The following organizations and programs are approved for IAH continuing education credit.

Indiana Green Expo INLA Summer Meeting INLA Magazine Quizzes (quarterly) AmericanHort Chicago Botanic Garden Gabis Arboretum at Valparaiso University Indiana Arborists Association IPLLA (Indiana Professional Lawn and Landscape Association) ILA (Indianapolis Landscape Association) NALP (National Association of Landscape Professionals) NWINLA (Northwest Indiana Nursery and Landscape Association) Purdue Extension Tree Care Industry Association

Other programs may qualify for CEU credit. Submit the CEU Course Approval Application for review.

Exam schedule

Upcoming exams.

Register for an upcoming IAH certification exam at a location near you. Contact the INLA office to reserve your seat.

FEB 9
2026

IAH Certification — Indiana Green Expo

Indianapolis, IN · Monday Workshop Exam · Completed

Completed
APR 29
2026

IAH Certification — New Castle

New Castle Correctional Facility · 7:00 AM · 20 candidates

Register →
MAY 8
2026

IAH Certification — AmeriCorps Indiana

West Lafayette, IN

Register →
MAY 11
2026

IAH Certification Retest — Area 31

West side Indianapolis · Retest session

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MAY 27
2026

IAH Certification — South Newton High School

South Newton, IN

Register →

Questions about the exam?

Contact Rick Haggard at rhaggard@inla.org or Julie Gillen at jagillen41@yahoo.com. Call (800) 443-7336.

Register online

IAH exam registration.

Complete the form below to register for an upcoming IAH certification exam. The INLA office will confirm your registration and provide payment details.

Registration Details

Get started

Ready to get
certified?

Join the ranks of over 700 Indiana Accredited Horticulturists. Register for an upcoming exam or contact the INLA office to learn more.

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