• 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

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. 


2024 Public events at the Urban Garden Center!

Registration for events are available on Eventbrite registration, or by walk-in registration at the UGC office on Wed 9 am - noon (808-453-6055). 

  • June 8 - Second Saturday at the Garden Register HERE!
  • May 21 - `Ahu`awa cordage making workshop. Register HERE!
  • October 12 - Second Saturday at the Garden.


Oʻahu Master Gardener Coordinator


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:


Oahu Events

Oʻahu Gardening Events

Find Us to talk story about your garden or submit a MG Helpline Intake Sheet or insect sample at your local Farmers Market or the Helpline locations listed below. information about gardening in Hawaiʻi is located in Tropical Topics

2024 Event Dates: 

  • Helpline on Wednesdays, 9 am to Noon, Urban Garden Center. Walk-in or call 808-453-6055. Master Gardeners available to answer plant questions; fruit fly lure and CTAHR seed available for purchase. 
  • Helpline on Thursdays, 9:30 am to Noon at Hale Tuahine (across Manoa Market Place)
  • Oct 20 - Windward CC Maia (Banana) Festival, 9 am - 2 pm
  • Oct 12 - UGC Second Saturday at the Garden, 9 - 11:30 am
  • Aug 3 - Halawa Xeriscape Garden Plant Sale
  • June 8 - UGC Second Saturday at the Garden, 9 - 11:30 am
  • May 25 - Kapiolani Community College Farmer's Market
  • May 11 - Mililani Orchid Club Plant Sale, 8 - 2 pm
  • Apr 27 - Kapiolani Community College Farmer's Market
  • Apr 20 - Foster Botanical Garden Plant Sale, 9 am - 2 pm
  • Mar 30 - Kapiolani Community College Farmer's Market
  • Feb 10 - Urban Garden Center Second Saturday, 9 - 11:30 am
  • Feb 8 - Ag Day at the State Capital, 11 am - 1 pm
  • Jan 27 - Kapiolani Community College Farmer's Market

Like the Oʻahu Master Gardeners Facebook page 

Visit us at your local Farmers Market!

Bring your home gardener question to our “Got a Plant Question” Booth at your local farmers market! 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. Dead leaves or rotting fruit does not allow us to see all the symptoms of the problem! Pictures of the garden or plants showing stress is encouraged! Please read here for more information: Collecting Plant Disease and Insect Pest Samples for Problem Diagnosis.


  • Kapiolani Community College Farmers Market, last Saturday of the month (every other month) - January, March, April, July, Sept., Nov. 2024

Join Us!  


Application for the Master Gardener Class of 2024 is closed.

To be placed on a notification list for the 2025 training class, use the following link to complete an application notification form:  2025 MG Course Notification Form

We are trying to grow our volunteer program and we invite you to apply. The UH Master Gardener Program on O'ahu hosts its introductory training class every Friday (except holidays), 9AM -1PM from February – May. Please click on the link to view our 2025 MG Course Invitation to Apply  and read through our program requirements. This program depends on your volunteer commitment. 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), and includes 30 community service hours. 


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 via our on-line form.

  • Email tinat@hawaii.edu for a speaker request

Annual Events where you can find “Got a Plant Question” Master Gardener booths



2023 CTAHR Outstanding Volunteer

Bea Sailer photo-B25638148627301583160  

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


Oʻahu Gardening Questions

  • SUBMIT a question through E-mail to: 
  • Phone: 808-453-6055 (Wednesday 9 - Noon, or leave a message)


Volunteer Management System

Volunteer Management System logo VMS LOGIN

Get Help

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

Contact Tina Lau if you have questions.