OʻAHU MASTER GARDENER PROGRAM

  • MG Graduation, Certification, and Emeritus Celebration on May 31, 2024

    MG Graduation & Certification 2024
  • MG Plumeria Project Group 2024

    Plumeria Project Group 2024
  • MG class of 2023 graduation, certification & emeritus celebration at UGC on 5/26/23. Including Bea Sailer volunteer award with Assoc. Dean and Director Jeremy Elliot-Engel.

    MG Celebration 2023-05-26
  • MG class of 2022 certification on 5/26/23 at UGC

    MG class of 2022 certification
  • 2023 CTAHR Volunteer of the Year Award awarded to Bea Sailer by Jeremy Elliot-Engel, Associate Dean and Associate Director for Cooperative Extension 

    2023 Bea Sailer Award
  • MG Class of 2018 Emeritus Celebration at Hale Tuahine on 6/22/23.

    MG Emeritus Class of 2018

Helpline is OPEN!

Got a Plant Question?

The UH Master Gardener program is an official Volunteer program of the University of Hawaiʻi Cooperative Extension Service. We are dedicated to disseminating local, research based information. please contact us with your gardening questions.

Submit a question through E-mail to: OahuMG@hawaii.edu

Phone or Walk-in: 

UGC Helpline is open on Wed morning 9 am - Noon, 808-453-6055.

Mānoa Helpline is open on Thursday morning 9:30 am - Noon Address: 2727 Woodlawn Dr, Honolulu, HI 96822 (driveway is across the Manoa Market Place) 

Important information to include is the name of your plant, the symptoms that you are observing, the environmental growing conditions, along with the location where it grows. We love pictures! If you are sending a picture through email, please include a close-up of the problem area as well as a picture of the entire plant. This will help us diagnose your problem or identify your insect. Or submit an MG Helpline Intake Sheet.

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Oʻahu Master Gardener Coordinator

Tina          

Tina Lau

Junior Extension Agent
email: tinat@hawaii.edu

University of Hawai'i CES
Urban Garden Center

955 Kamehameha Hwy.
Pearl City, HI 96782-2501
Phone: (808) 453-6059
Fax: (808) 453-6052

Oʻahu Urban Garden Website:
www.ctahr.hawaii.edu/ougc/

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Oʻahu Gardening Events

Find Us to talk story about your garden at the following events across the island. Registration for events at the Urban Garden Center are available on Eventbrite or by walk-in registration on Wed morning at UGC classroom (808-453-6055).

2025 Event Dates:

  • May 31 (Sa) - Kapiolani Community College Farmers Market
  • June 2 (M) - UGC Container Gardening Workshop, 9:00 - 11:30 am. Register by clicking HERE!
  • June 14 (Sa) - Learn to Worm with Mindy Jaffe, 9 am - 11 am. Register Here for Worm Workshop!
  • June 14 (Sa) - UGC Second Saturday at the Garden, 9 - 11:30 am. Register Here for Second Saturday at the Garden
  • June 28 (Sa) - Kapiolani Community College Farmers Market
  • Aug 2 (Sa), 9 - Halawa Xeriscape Garden 2025 Annual Unthirsty Plant Sale, 9 - 1:00 pm
  • Sept 13 (Sa) - UGC Second Saturday at the Garden, 9 - 11:30 am 

Like the Oʻahu Master Gardeners Facebook page 

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Join Us!  

If you would like to be notified for next yearʻs University of Hawai‘i Master Gardener Spring class, sign-up on the notification list below.

2026 Notification List: https://forms.gle/wV7P7gWnyES5g6BF6

The UH Master Gardener Program on O'ahu hosts its introductory training class every Friday (except holidays), 9AM -1PM from February – May and hands-on project sessions on weekdays. Please click on the link to view our 2025 MG Course Invitation to Apply  and read through our program requirements.  If accepted into the program as a volunteer of the University of Hawai‘i Master Gardener Program, you will sign a contract with us to fulfill 50 volunteer hours within the first year of completing the training course (June 2025-May 2026), that includes 30 community service hours. 

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Visit us at the KCC Farmers Market!

Bring your home gardener question to our “Got a Plant Question” table at the Kapiolani Community College farmers market on the last Saturday of the month. Purchase UH Vegetable Seeds for your home garden!

Tips: When bringing plant samples with suspected plant disease be sure to bring new leaves AND old leaves, include flowers or fruits that show symptoms. Pictures of the garden or plants is encouraged! Please read here for more information: Collecting Plant Disease and Insect Pest Samples for Problem Diagnosis. Information about gardening in Hawaiʻi is located in Tropical Topics.

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Educational Outreach

Oʻahu Master Gardeners are reaching out to home gardeners, school garden educators, elementary school students, and plant industry professionals! Click the links below to find out more!

Do you have a request for a Gardening Presentation for your local organization taught by a UH Master Gardener?  Please request at least 1 month in advance by sending an e-mail to  tinat@hawaii.edu for a speaker request

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Cooperating Programs  

  • Hui Māla ʻAi, a state-wide network for food gardens, aims to improve public health by increasing access to gardening opportunities for people in Hawaiʻi, and to support food gardens that play a critical role in promoting health equity and food security. Check out the Hui Māla ʻAi website (https://huimalaai.org/) to learn more and to become a member!

Volunteer Corner 

2023 CTAHR Outstanding Volunteer

Bea Sailer photo-B25638148627301583160  

Master Gardener Emeritus Beatrice Sailer is recognized as the CTAHR Outstanding Volunteer - CTAHR Website (hawaii.edu)

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Volunteer Management System

Volunteer Management System logo VMS LOGIN

Get Help

MG Volunteer Calendar Year: June 1 to May 31. Please enter your volunteer hours to maintain your certification. 

Contact Tina Lau if you have questions.