At this time, events are being scheduled but may change without much notice depending on current covid-19 restrictions. Please check with the organizer for any you are interested in to get the most uptodate information.

OHS Exclusive: Canadensis – A vision for a national botanical garden


This presentation is exclusively for paid members of the Otttawa Horticultural Society. Memberships can be purchased here: The Zoom link for the presentation will be emailed to OHS members. Join us for an update on this exciting project, presented by Gérald Lajeunesse, Chair, Canadensis Botanical Garden Society Board of Directors. Ottawa, as many cities […]

Dirt and Bugs: The Glue that Holds Great Gardens Together with Pat de Valance


This meeting will be held online (most likely).  Contact to register. Dirt & Bugs: The Glue that Holds Great Gardens Together.  Learn:  How to measure what kind of Soil you have and what it means  What you need to know about soil and insects, to maintain a healthy garden, organically  How […]


Growing More Butterflies


Butterflies come from caterpillars and caterpillars can only eat very specific plants. To attract adult butterflies, a garden needs to have good nectar-producing plants to feed the adults and, just as importantly, the specific native host plants for the next generation. Speaker Trish Murphy will look at some of the diverse species of Milkweeds that […]

Springing for Plants! online plant sale – Ottawa Horticultural Society


Springing for Plants! Spring is coming and with it the Ottawa Horticultural Society’s second-ever online plant sale! This sale will offer a variety of indoor plants, perennials including native plants, and will feature seedlings of annuals, edibles, and perennials, all donated by OHS members.  All items will be “buy now” for immediate sale; no auction […]

Nature’s Best Hope – Webinar with Doug Tallamy


Don't miss our featured speaker for 2021, Doug Tallamy! Recent headlines about global insect declines and three billion fewer birds in North America are a bleak reality check about how ineffective our current landscape designs have been at sustaining the plants and animals that sustain us. Such losses are not an option if we wish […]

Development of Early Botanical Gardens in Canada


Online presentation by David Galbraith of the Royal Botanical Gardens in Burlington. The story of the early development of botanical and large public gardens in Canada has been largely overlooked by historians. A few existing gardens with 19th century roots are well known, like the Halifax Public Gardens and the gardens at the Central Experimental […]