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:
- Jul 13 (Su) - Hawaii State Farm Fair at Whitmore Village, Wahiawa, Corn exhibit and Plant Doctor, 9 am - 3 pm.
- July 19 (Sa) - Halawa Xeriscape Garden Soil talk, 9 - 10:30 am. Register HERE
- July 26 (Sa) - KCC Farmers Market Plant doctor table
- Aug 2 (Sa), 9 - Halawa Xeriscape Garden 2025 Annual Unthirsty Plant Sale, Plant Doctor table, 9 - 1:00 pm
- Aug 9 (Sa) - Learn to Worm with Mindy Jaffe, 9 am - 11 am. Registration HERE!
- Aug 30 (Sa) - KCC Farmers Market, Plant doctor table
- Sept 13 (Sa) - UGC Second Saturday at the Garden, 9 - 11:30 am
- Sept 20 (Sa) - Windward Mall, Imagine a Day Without Water, 10 am - 2 pm. Fun Activities for the family!
Like the Oʻahu Master Gardeners Facebook page
Learn about Worms & Vermicompost
"HONOLULU (KHON2) — Jessica Higashi from the Oahu Master Gardener Program School and Mindy Jaffe, Operations Manager at the Magoon Wormery, joined Brittni Friedlander on Wake Up 2Day to share the sustainable and helpful details of vermicast for gardening."
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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”/ Plant doctor table at the Kapiolani Community College (KCC) 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!
- Learn to Worm Ohana, Vermicomposting is gaining in popularity across Oʻahu as concerned citizens of all ages discover the fascination of cultivating a colony of composting worms. Worms turn garbage into gold by eating household food waste and producing vermicast, a superior soil amendment ideal for all kinds of gardens, potted plants, landscaping and lawn. Join a workshop at UGC or at the Magoon Research Station in Mānoa.