OHS Great Pollinator Garden Awards Contest

New for 2024!

The OHS is proud to launch its first ever Great Pollinator Garden Awards Contest.  Help celebrate the important work of Ontario’s native pollilnators by planting a pollinator garden.

Pollinators and other insects face many threats these days.  Gardeners can make a big difference by planting native and non-native plants to attract them.  No matter your garden size, whether it is your front lawn, a shared city street scape or a balcony container garden  – you can make a difference.

Nominate yourself or a neighbour using our contest submission form. Participants are to provide details such as a brief description of the garden, a list of native plants, and include up to 3 digital photos.  The deadline is September 15, 2024 (midnight).  Prizes for the top entries will be awarded at the AGM in December 2024.

Please click on the button below for full contest details, criteria and the official submission form.  We look forward to your entries.  Good luck to all participants and happy gardening.

OHS Spring Plant Auction and Sale

Tuesday May 21st @ 7 pm | Tom Brown Arena Hall

Green thumbs and plant lovers, please join us for our upcoming OHS Spring Plant Auction and Sale!

Request for Donations: if you have a rare or special plant please share the joy by donating a division to our auction. Your cherished plant could be the highlight of someone’s collection! For plant review, approval and preparation, please contact Maureen Mark by May 14th.

Volunteer Opportunities are still available:  for details about available jobs and the sign-up form, please reach out to Tuula Talvila (contact info available though the members details button below).

Auction Teasers: we have some special plants being offered.  For details, check out the information page using the member link.

    Let’s make this event a big success together!

    The OHA's 116th Convention - Guelph, Ontario

    Registration for the OHA Convention

    Early bird registration is now over.  However, if you want to register there’s still time.  See details below. 

    Message from the OHA Registrar:

    “Join us for the 3-day Ontario Horticultural Association’s Convention and Annual General Meeting from July 12th-14th!

    Our adventure to discover “the heartlands of gardens growing and rivers flowing” begins July 12th during our 116th OHA convention hosted by Districts 7 and 8. Our hosts have worked hard to plan an awesome adventure for us, full of delicious meals, fantastic bus trips, exciting guest speakers/seminars and wonderful accommodations…”

    Full details and how to register available to OHS members by clicking on the button below.  Register soon!


    OHS Spring 2024 Newsletter Has Arrived - The Dibbler!


    We are pleased to announce that the OHS Spring Newsletter “The Dibbler” is now available for your reading pleasure. New name but same great content.

    Read about: growing orchids, keeping squirrels away from your bulbs, the Ottawa Wildflower Seed Library, gardening resources on the web, plant nomenclature, residential gardening in a city right-of-way, the final chapter in the Cardoon Chronicle, and a historical piece on Richard Warren Oliver who influenced a number of Ottawa gardens in his day.

    Fellow dibblers – enjoy and happy gardening!



    OHS 2023-2024 Yearbook Now Available


    We are pleased to announce the completion of the OHS 2023-2024 Yearbook. This special edition encapsulates two years of programs, events, activities, and competitions. Beyond mere documentation, it stands as a testament to the unwavering commitment of members like you.

    Moreover, the yearbook serves as a historical chronicle, preserving our journey and celebrating the OHS community. We extend our heartfelt gratitude to all those who generously shared their expertise and valuable contributions to help produce this document.

    Enjoy exploring this captivating publication, available in PDF and Flipbook formats. Members, pls click on button below.

    Let its pages transport you through our shared experiences and achievements. Happy reading!

    Save the Dates!

    OHS 2024 Plant Auction and Sales

    Next Event:

    OHS Plant Auction and Sale:
    Tom Brown Arena Hall  ~ Tuesday May 21 ~ 7-9 pm 

    Ottawa South Porch Sale:
    Location: Ottawa South (exact location TBC) ~ Saturday Sept 7 (times TBC)

    We look forward to seeing you at these events.


    2024 OHS Photographic Competition

    Light, flower, camera…action!”

    Attention all members and photobugs! We are pleased to announce that the theme for the 2024 competition is “The Cinematic Garden”.

    Movies and flowers have much in common … romance, symbolism, plots, variety, star-power and, of course, photogenic and emotive beauty!

    For a downloadable copy of the detailed competition classes and entry rules, please click on the following link: Rules & More.  Submission deadline for entries is October 24, 2024. Winners will be announced at the Annual General Meeting (AGM) in December.

    Looking forward to all the wonderful entries for 2024!  Good luck to all.

    Photo Credit: Larry Chamney, “Anemone” (2023)

    About the Society

    The Ottawa Horticultural Society is a non-profit society open to all gardeners – we invite you to join us in sharing our enthusiasm and knowledge of gardening.

    Join or renew membershipDonate


    Program meetings, most often open to the public, are held every month from September to June. Currently we meet in person and use hybrid technology to live-stream presentations. Check out general event information, past presentations, as well as the upcoming schedule.


    We hold three main plant sales each year – two in the Spring and one in the Fall, all open to the public.

    We also have flower shows, a photo competition and garden tours for members, and do community planting work.

    Gardening Tips

    New to gardening or looking to learn more? Check out our gardening section including our Gardening 101 articles and other gardening information, including a video on growing from seed, and ideas for native plants to consider in your garden.

    Members’ Section

    Access the members only section to read the latest Newsletter and consult Yearbooks, other recent Newsletters, and more.  Password required.