Waste Streams
Home composting in Canada: backyard bins and green-bin programs
Food and yard waste make up a large share of what leaves a typical household. Composting keeps that material out of the garbage stream, where buried organics break down without oxygen and release methane. At home, the same scraps can be diverted in two main ways: a backyard compost system you manage yourself, or a municipal green-bin (organics) collection where it is available.
Two routes: backyard bins and green-bin collection
Many Canadian municipalities run curbside organics collection alongside garbage and recycling. Where a green bin is provided, accepted materials and collection days are set by the local program, so the most reliable instructions are the ones published by your own municipality. Backyard composting is the alternative or complement: it works year-round in principle, though cold winters slow the process considerably in much of the country.
What backyard composting needs
A working pile balances two categories of material:
- Greens — nitrogen-rich material such as fruit and vegetable trimmings, coffee grounds, and fresh grass clippings.
- Browns — carbon-rich material such as dry leaves, shredded uncoated paper, and small amounts of cardboard.
A common starting ratio is roughly two to three parts browns for each part greens by volume, adjusted by how wet or smelly the pile becomes. Turning the pile introduces air and speeds decomposition; keeping it about as damp as a wrung-out sponge prevents both drying out and sour, anaerobic conditions.
Avoid in backyard bins
Meat, fish, dairy, fats, and pet waste attract animals and create odours in an open backyard system. Green-bin programs sometimes accept more of these because they process organics at higher temperatures, so follow your municipality's accepted-items list rather than general advice.
Keeping pests and odours down
Most odour and pest problems trace back to too much wet green material and not enough air or browns. Practical adjustments:
- Bury fresh scraps under a layer of browns rather than leaving them exposed.
- Use a bin with a secured lid and a base that limits digging animals.
- Keep a small lidded container in the kitchen and empty it every few days to limit indoor smell.
- If the pile smells sour, add browns and turn it; if it is dry and inactive, add greens and a little water.
Winter composting
Cold weather slows microbial activity, and a backyard pile may largely pause until spring. Many households keep adding material through winter and accept that breakdown resumes when temperatures rise. In areas with green-bin collection, organics are still picked up on schedule, which is often the more practical route during freezing months.
Quick reference
| Material | Backyard bin | Notes |
|---|---|---|
| Fruit & vegetable scraps | Yes | Cut large pieces smaller to speed breakdown |
| Coffee grounds, tea | Yes | Counts as greens |
| Dry leaves, shredded paper | Yes | Essential browns |
| Meat, dairy, oils | Generally no | Check green-bin rules instead |
| Compostable plastics | Depends | Only if the local program accepts them |
Sources
For program-specific rules, rely on official public sources:
- Environment and Climate Change Canada (canada.ca)
- Government of Canada — waste and recycling information
Because accepted items and collection schedules differ by municipality, confirm details with your local government before changing how you sort.