• Oahu 1


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

«October 2022»


Got a Plant Question?

The UH Master Gardener program is an offical Volunteer program of the University of Hawaiʻi Cooperative Extension Service. We are dedicated to disseminating local, research based information to assist home gardeners in decisions that affect themselves, our neighbors and our local and global environment.  So much information about gardening in Hawaiʻi is located in Tropical Topics. Enjoy exploring the wealth of information that we have to share with you.

If local information is not available on your subject, we are trained to find research based information and other reliable sources of information, so please contact us with your questions.

Thank you for contacting us with your questions!  We believe that no questions are the worst questions. With so much beauty and diversity in Hawaiʻi, we have a BIG responsibility to have the right tools and correct information to protect our environment and we want to help your garden thrive.

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

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.

Oʻahu Gardening Questions

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. 

  • Helpline on Wednesdays, 9 am to Noon at the UH Urban Garden Center
  • Helpline on first Thursday of the month, 9:30 am to Noon at Hale Tuahine (across Manoa Market Place)
  • Honolulu Maker's Market Bloom Garden and Art Festival, July 16-17,2022
  • Farm Lovers Market, Kailua Town (TBD)

You can also Find Us to talk story about your garden or submit a plant or insect sample at Second Saturday at the Garden! program on the 2nd Saturday this summer (Aug. 13, Sept 10, 2022). 

Like the Oʻahu Master Gardeners Facebook page 

Join Us!  

Applications for the 2023 Master Gardener class will be available in Dec. 2022. Check this website later in the year. 

We are trying to grow our volunteer program and we invite you to join us. The UH Master Gardener Program on O'ahu hosts its introductory training class every Friday (except holidays), 9AM -12PM from February 2023 – May 2023. Please click on the link below to view our invitation 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 2023-May 2024).

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.


  • Kailua Town, Farm Lovers Market

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.

The following events are ON HOLD until further notice.

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


Events on the Second Saturday of the Month!

Registration for events are available on Eventbrite.

September 10: 

Giant Fruit and Vegetable Contest Weigh-in and Awards [CLOSED]

Composting demonstration 

Grafting demonstration

Rain barrel construction demonstration

Avocado for home growers workshop

Pollinator exhibits

Rose Garden Tours

- CTAHR seed sales


2022 Extension in the Garden Series

Oʻahu Gardening Questions


Plant or Problem ID

  • FIND US at Educational Outreach events



Volunteer Management System

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