Grow Healthy Soil Together

Become a part of Compost Toronto to enrich the soil of our city, promote biodiversity, and foster community.

About Compost Toronto

At Compost Toronto, we share practical and science-based knowledge to help restore living soils.

Our resources are grounded in biological composting, soil ecology, and hands-on community experience. We combine research, field practice, and education to support regenerative urban systems.

Explore our guides, tools, and learning materials below.

Two men using a pitchfork to turn organic waste in a wooden backyard compost bin for sustainable gardening.
Two men using a pitchfork to turn organic waste in a wooden backyard compost bin for sustainable gardening.

Soil first

Learning by doing

Workshops, shared piles, real experimentation

Composting guided by biology and micro diversity

Research-Based Composting

Our work is informed by applied research in vermicomposting and soil science

A community group gathers in a field for a tree planting event with shovels and soil buckets.
A community group gathers in a field for a tree planting event with shovels and soil buckets.
  • Organic matter content

  • Nutrient availability (N, K)

  • Soil structure and water retention

  • Microbial activity

Studies show that the composition of organic inputs directly affects compost quality. For example, combining nitrogen-rich materials with carbon sources significantly improves:

These principles guide how we build compost systems in Toronto.

Our Activities

Helping Toronto grow healthy soil and vibrant communities.

Volunteers use shovels to mix smashed pumpkins for organic composting in a community garden.
Volunteers use shovels to mix smashed pumpkins for organic composting in a community garden.
Urban Composting

Guidance and tools to compost in city spaces.

Soil Education

Workshops and resources to nurture living soil.

Community Events

Join gatherings that build connections and biodiversity.

We offer soil and compost testing analysis and asessment

Services
Diverse group of community volunteers using shovels to turn a large compost pile in a public park garden.
Diverse group of community volunteers using shovels to turn a large compost pile in a public park garden.

Grow

Scenes from our community gardens and compost workshops in Toronto.

Children and families participate in an outdoor garden education workshop at a community urban farm.
Children and families participate in an outdoor garden education workshop at a community urban farm.
Researchers in a biology lab using a digital compound microscope and laptop to analyze soil samples.
Researchers in a biology lab using a digital compound microscope and laptop to analyze soil samples.
Volunteers filling a large compost bin with dry hay and organic waste in an urban garden.
Volunteers filling a large compost bin with dry hay and organic waste in an urban garden.
Reotemp compost thermometer with orange handle measuring heat levels in a backyard composting bin.
Reotemp compost thermometer with orange handle measuring heat levels in a backyard composting bin.
Ready to build living soil with us?

Join Compost Toronto to learn, participate, and contribute to regenerative systems across the city.