The Concordia Greenhouse Project is excited to welcome ABCompost under its umbrella! Founded through Concordia’s Zero-Waste program, ABCompost is a student-led group that runs vermicomposting workshops, processes food waste from campus providers like Le Frigo Vert and the People’s Potato, and manages composters at Loyola campus. This partnership will help ABCompost expand its educational initiatives, launch the Hungry Bin Project, and strengthen the Greenhouse’s role in food waste diversion and urban composting.
What is vermicomposting?
Vermicomposting is a natural method where earthworms and bacteria quickly break down food waste into rich compost. Unlike traditional composting, it can be done safely indoors and works faster than outdoor piles or tumblers. Only a few worm species are suitable, mainly the red wiggler (Eisenia fetida), along with the European nightcrawler, African nightcrawler, and Indian blue worm. These worms thrive in dark, ventilated bins with soil bedding and a steady supply of food scraps. In the right conditions, they eat the waste, reproduce, and lay cocoons containing 10–20 baby worms.
As the worms digest the food, they produce vermicompost—nutrient-dense castings often called “worm poop.” This natural fertilizer is much richer than most store-bought compost and is highly valued by gardeners and farmers. Vermicomposting not only reduces food waste but also creates an excellent soil amendment for growing healthy plants.
Volunteer with ABCompost
Volunteer hours are every Wednesday 15h00 – 17h00
For more on educational workshops and events contact us at…
Email: abcompostconcordiamtl@gmail.com
Instagram: @abcompostmtl
Composting Research
Throughout the 2024-2025 academic year our Composting Coordinator, Catherine Rokakis, conducted a survey on student compost habits. The summary of the report is listed below. A full report can be found on our research page.
Thanks for your support!
We would like to thank everyone from Facilities Management for all of their help in making this collaboration a reality, specifically Jackie Martin and Faisal Shennib for their incredible support of so many projects like this and many others at Concordia. Also we would like to thank Oliver De Volpi from Hospitality for letting us temporarily use the Dish Project space on the Hall building’s very busy 7th floor while the Greenhouse is closed. And finally, thank you to Catherine Rokakis and Isabella Curiel-Ploumis, the founders of ABCompost, for agreeing to come on board.
ABCompost will continue their amazing workshops and operations as they did before, so stay tuned for volunteer opportunities, internships, and other great programs as they become part of the Concordia Greenhouse family!
Concordia Greenhouse Project 