How to make a worm composting bin from a plastic tote

Quick Answer

Green Writer wrote this page for readers who want to start composting by converting a standard storage container into a vermicomposting system. Vermicomposting is the process of using worms to break down organic waste into nutrient rich soil.

Efficient worm composting requires a moisture level like a wrung-out sponge, which means keeping the bedding damp but not dripping. While most people think worms need constant movement, you can improve your results by composting in a stable, dark environment.

Bedding provides the environment for your worms

Bedding is the material that makes up the base and structure of the bin. It provides a moist habitat and a surface for the worms to live in. Choosing the right material ensures your worms stay healthy and active.

Steps to build a plastic tote composting system

To make a worm composting bin from a plastic tote, drill ventilation holes in the lid and sides. Fill the container with bedding and one pound of worms. Use a second tote to create a stacking system for easy harvesting. You can compare vermicomposting with traditional composting to verify your setup and ensure air flows freely through all drilled holes.

Harvesting allows you to collect the finished compost

Harvesting is the process of removing the finished compost from the bin. You do this by separating the worms from the processed waste. Knowing how to do this allows you to use the finished product in your garden.

1. Drill ventilation holes in the plastic tote lid and upper sides using a power drill to ensure airflow.
2. Layer the bottom of the plastic tote with bedding until the container is half full.
3. Add one pound of worms to the bedding to start the composting process.
4. Place a second plastic tote on top of the first to create a removable layer for harvesting.

Harvesting methods

• Remove the top tote to access the bottom layer of castings. Castings are the waste material produced by worms as they digest organic matter.
• Scoop out the finished material from the bottom of the bin.
• Replace the top tote to allow the remaining worms to continue processing waste.

Extracting finished material from the bin

Extract finished material by removing the upper container. This method allows worms to stay in the bottom bin while you collect the processed compost from the lower layer.

What size plastic tote is best for a home worm bin?

A storage bin with a capacity of 18 to 30 gallons is a common size plastic tote for a home worm bin. This volume allows enough space for the worms to move and for the bedding to maintain moisture without becoming waterlogged. Smaller bins may restrict worm movement and cause heat buildup.

Benefits of rectangular bin shapes

The shape of the container affects how you build the system. A rectangular bin allows you to stack layers of bedding and food easily. A round bin might make it harder to reach the center to turn the contents. Choose a bin that fits in a space where you can keep it out of direct sunlight.

Choosing the right dimensions for a worm bin

Select a tote that allows you to begin the bin with one pound of worms, about 1,000 individual worms. Ensure the height of the bin allows for a depth of bedding that the worms can navigate. Proper dimensions help you maintain the correct moisture level and airflow for the colony.

Recommended bedding for your new bin

Use shredded newspaper, cardboard, and peat moss to create a base for your worms. These materials provide structure and moisture for the worms to inhabit. You can start container composting in a bin to add bulk to the system.

Cardboard breaks down into organic matter. Peat moss helps the bedding retain the correct amount of moisture.

Bedding material list

• Shredded newspaper creates a carbon source for the worms.
• Cardboard pieces provide a durable structure for the bin.
• Peat moss helps maintain consistent moisture levels.
• Coconut coir serves as a sustainable alternative to peat moss.
• Straw provides a textured surface for the worms to move through.

Common materials for bedding

Select materials that are carbon-rich to balance the nitrogen in food scraps. Shredded paper and cardboard are common choices for beginners. Avoid materials with heavy chemical coatings or dyes.

How many worms do I need to start a bin of this size?

To determine how many worms I need, begin the bin with one pound of worms, about 1,000 individual worms, according to U.S. EPA, Composting at Home. Red wiggler worms are a common species used for this process. You can learn what to feed my composting worms to help them thrive in the organic matter of a bin to create compost.

Worm quantity based on bin volume

The total quantity of red wiggler worms depends on the storage bin volume. Suppose a person uses a 10 gallon storage bin. Assume the calculation requires 1,000 worms per gallon. Multiplying 10 gallons by 1,000 worms per gallon results in a total of 10,000 worms.

Fixing a bin that starts to smell

A bin that smells often has too much moisture or too much food. Turn the bedding to add oxygen. Add dry shredded paper or cardboard to absorb excess liquid.

Optimal locations for your tote bin

Keep your tote bin in an indoor space or a garage. These locations keep the bin away from extreme weather and pests. You must choose a spot that stays at a consistent temperature and remains out of direct sunlight.

Advantages of using a garage

A garage offers a convenient location because it remains shaded and protected from heavy rain. You can set the bin on a level floor to prevent the tote from tipping. A garage also helps hot bin composting break down scraps quickly.

Benefits of indoor bin placement

An indoor space works well for small systems where you want to monitor the worms daily. You can manage apartment composting with small bins or place the bin on a sturdy shelf. This setup keeps the bin accessible for regular maintenance and feeding.

Finding the best indoor or outdoor spot

The best location avoids extreme temperature swings. Worms prefer a stable environment where they can thrive. You should check that the area has good airflow to prevent moisture buildup. A shaded area near a water source helps you maintain the bin easily.

Build your own worm composting bin from a plastic tote

Assembly and setup instructions

1. Identify a suitable plastic tote for your composting system. Select a durable bin with a lid. A bin that is too small will not provide enough space for the worms to grow.
2. Drill ventilation holes into the sides and lid of the tote. Create several small holes. Proper airflow is necessary to prevent the bin from becoming anaerobic.
3. Prepare a bedding layer of shredded paper or cardboard. Moisten the material until it feels like a wrung out sponge. This provides the initial habitat for the worms.
4. Source the correct amount of worms for your new bin. Begin the bin with one pound of worms, about 1,000 individual worms. This ensures the colony is large enough to process waste.
5. Consult the U.S. EPA, Composting at Home for maintenance tips. Read the guide to confirm your feeding schedule. Follow the guidelines to ensure the bin remains healthy and productive.

Frequently asked questions