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).

2026 Event Dates:

• Aug 10 (M) - Growing Tomatoes in Hawaii at CARES Waimānalo, 1:30 - 3:00 PM. Register Now!
• Aug 8 (Sa) - Learn to Worm Workshop at CARES Waiawa (formerly Urban Garden Center in Pearl City), 9 - 11 AM. More information here or Register Here!
• Aug 9 (Su) - Waimānalo Kumu ʻAi food forest workday, 8 - 11 AM at 41-348 Nakini St. (registration not needed)
• Aug 22 (Sa) - KCC Farmers Market, Plant doctor table
• Aug 30 (Sun) - Banana Festival, 10:00 AM - 2:30 PM, "Got a Plant Question" table. Register Here

Like the Oʻahu Master Gardeners Facebook page 

Learn about Worms & Vermicompost 🪱

https://www.khon2.com/local-news/learn-about-the-magic-of-vermicast-and-nurturing-your-garden

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Visit us at the KCC Farmers Market on the fourth Saturday of the month in 2026!

Bring your home gardener question to our “Got a Plant Question”/ Plant doctor table at the Kapiolani Community College (KCC) farmers market on the fourth Saturday of the month. Purchase UH Vegetable Seeds for your home garden! (check for date changes in Event Calendar during the holidays) 

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!

• School Gardening Basics
• Hawaii Fruit Fly Suppression Program
  Video available online! Fruit Fly Control in Hawaii: How to control Hawaii's fruitflies

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.