The OHA gives several awards and grants each year.

Virtual Flower Show Guidelines

Latest News

Download our colouring pages for some family friendly fun.

December 50/50 Draw

by OHA Webmaster | November 15, 2025 | Uncategorized | 0 Comments

It's time for our December 50/50 draw, to be held on December 13, 2025. As always, proceeds will go to support Garden Grants and Education in Ontario. Tickets are: 10 for $10 100 for $20 300 for $50 700 for $75 Get your tickets now at...

Recruitment, Retention, and Succession Planning

by OHA Webmaster | November 11, 2025 | RESOURCES, Uncategorized | 0 Comments

How can Horticultural Societies and Clubs attract and keep more members in their Society/Club? What will happen when your current leaders can no longer carry on? Join Lily Viggiano from Volunteer Canada, to learn how Societies/Clubs can position themselves for the...

Trillium Autumn 2025

by OHA Webmaster | October 9, 2025 | Trillium News, Uncategorized | 0 Comments

Trillium Autumn 2025 is now available!

Trillium Summer 2025

by OHA Webmaster | July 9, 2025 | NEWS, NEWSLETTERS | 0 Comments

The Spring 2025 Trillium is available here!

OHA Conservation and Environment Committee Trivia

by OHA Webmaster | July 8, 2025 | RESOURCES | 0 Comments

The OHA's Conservation and Environment Committee has made up a trivia quiz with fun and interesting facts about pollinators, plants and trees. You can use the multiple choice and true/false questions as ice breakers at your meetings, or as a team game, or as a way to...

2025 OHA Bulb Fundraiser [UPDATED June 18]

by OHA Webmaster | June 10, 2025 | FUNDRAISING, GARDENING | 0 Comments

Attention: We only have thirteen more days to meet our minimum requirement of 100 cases for the special Bulb Order from Tradewinds. This is a fundraiser for the Ontario Horticultural Association which does not receive any monies from any other source than the...

July 50/50 Draw

by OHA Webmaster | May 28, 2025 | CONTESTS, FUNDRAISING | 0 Comments

The next 50/50 Draw takes place on July 19th. Current raffle is $2,960, with the winner taking half!!

Fall Bulb Sale

by OHA Webmaster | May 21, 2025 | Garden Shop | 0 Comments

Fall bulbs are now available to be ordered

GardenOntario website migration

by OHA Webmaster | May 16, 2025 | Uncategorized | 0 Comments

Update 2025-05-19: There were some technical issues, but migration is now complete. You should now find that the website is significantly more responsive that before! If you experience any issues, please let the Web Coordinator know. On Saturday, May 17, we will be...

Earth Day 2025 Videos

by OHA Webmaster | May 11, 2025 | Uncategorized | 0 Comments

As you are aware, Earth Day was held on April 25th. It was a lovely evening with excellent talks and questions. We had Emily Posteraro attend who spoke on the Box Tree Moth & the Spotted Lanternfly. Emily's video is accessible via the below link:...

🔎 Search the OHA website

Latest OHA News

Favourite Places

Find a Society

Searches

Secure Forms

Welcome

For more than 100 years, the OHA has supported gardening in Ontario with programs on gardening education, community events, and shows. GardenOntario is here to help you get growing and get involved!

Whether you are a new gardener looking for support or an experienced one who is willing to share what you know, there is a place for you at GardenOntario.

Visit our Garden Shop to get all the latest supplies. From pins to note cards, we have what you need… Also, order our bright and cheery logo on t-shirts, banners, and a variety of marketing materials online at our custom printables shop!

The Trillium is a newsletter produced quarterly. To receive an electronic copy, please email the Trillium Distributor () and the next issue will be sent directly to your inbox.

Past issues can be found on the Trillium page.

Volunteering and Fundraising

Many rewarding opportunities!

Get Involved

Visit the Garden Shop

Awards & Grants