Mini Compost Jar
Composting has been practiced for thousands of years as a way to return organic matter back to the soil and reduce waste. Making a mini compost jar is a hands-on way to observe decomposition and learn how nature recycles leaves, fruit, and vegetable scraps.
What do you do:
- Start with a clear jar or container and layer it with small pieces of fall scraps such as leaves, vegetable peels, and fruit cores.
- Add a small amount of soil to introduce microorganisms. Alternate layers of “greens” (food scraps) and “browns” (dry leaves, shredded paper) and lightly mist with water to keep it damp.
- Cover the jar loosely to allow airflow and place it somewhere it can be observed daily.
- Watch over time as the materials break down, and use a small stick to gently mix the layers once a week.
- Record observations of changes in color, texture, and smell.
Resources for learning more include Compost Council of Canada, Earth Easy: How to Compost, and Saskatchewan Waste Reduction Council
What do you need:
- A clear jar or small container with a lid
- Fall scraps like leaves, vegetable peels, and fruit cores
- Soil or compost from a garden
- Optional: shredded newspaper or cardboard
Spray bottle for moisture - Notebook or journal to record observations
Safety considerations
Wash hands thoroughly after handling compost materials. Avoid putting meat, dairy, or oily foods in the mini compost jar to prevent mold or bad odors. Keep the jar out of reach of very young children to prevent accidental ingestion of decomposing material.
Benefits:
Physical: Mixing and layering the compost improves fine motor skills. Carrying and collecting materials encourages movement and balance outdoors.
Spiritual: Observing decomposition fosters a sense of connection to natural cycles and respect for the processes that sustain life. It encourages patience and mindfulness as you witness slow, transformative changes.
Intellectual: Develops scientific observation and inquiry skills, including recording changes and making predictions. Teaches principles of ecology, biology, and sustainability.
Emotional: Creates a sense of accomplishment as scraps transform into nutrient-rich compost. Encourages curiosity, wonder, and pride in contributing to a healthier environment.