By the end of this lesson: you will understand the four jobs bedding performs.

Bedding is the structure of the habitat, it’s their home. It holds moisture, preserves air spaces, gives worms a safe place to retreat and supplies carbon-rich material that is gradually processed alongside food.

Weak bedding is often the hidden cause behind repeated problems. A bin can receive suitable food and still fail because the material has collapsed into a wet block. Conversely, a bin full of dry cardboard may be airy but unable to support active worms.

Judge bedding by performance, not price. Expensive coir is not automatically superior to free shredded cardboard. A mixed structure usually performs better than a single dense material.

• Moisture reservoir: Holds water without leaving the whole system flooded.
• Air structure: Creates gaps through which oxygen can move.
• Safe habitat: Allows worms to escape fresh food, temperature changes and disturbance.
• Carbon input: Balances wet scraps and becomes part of the final vermicompost.

Good Bedding Protects The Worms:

A healthy bin gives worms somewhere to retreat when food is too fresh, too wet, too acidic or too warm. Without enough bedding, the entire wormery can become one big food pile. That is when you get smells, flies and worms trying to leave. Good bedding gives the system resilience.

We often see videos with mountains of food dumped on top of what often appears to be a modest sized wormery.  We aim for less is more and not to overload an environment which is why (too often) so many setups fail.

Cardboard & Paper:

Plain brown cardboard is one of the best bedding materials for many home wormeries. It is cheap, often easy to find and excellent at soaking up excess moisture.

Remove tape, labels and glossy sections where possible. Tear or shred it so it does not form flat, airless sheets. If the bin is dry, dampen the cardboard first. If the bin is wet, add it dry.  Toilet roll or kitchen roll tubes are good as well so don’t discount them as extra cardboard.

Coir

Coir is common in starter kits and it is very easy to work with. It holds moisture well and gives a clean starting medium. The downside is cost if you scale up, and it does not bring much life to the system on its own. It is great bedding, but it still needs time, food and microbial activity to become part of a living wormery.

Leaf Mould & Mature Compost

Leaf mould or mature compost can help add biology to the bin. Use only safe, aged material that is not hot, chemically treated or full of things you do not want in your wormery. A small amount can help the system feel less sterile, especially in a brand-new plastic setup.

This is obviously seasonal in the UK but it’s free so don’t knock it and when scaling this can be excellent when autumn rolls around.  Enough to top up all your bins for free in one go!

Aged Manure

Aged manure can be excellent in worm farming, but it needs caution. Fresh manure can heat up, smell, contain residues, or be too strong for worms.

At Farmer Level, treat manure as an optional material rather than a beginner essential.

If you use it, use well-aged material and test small amounts before committing a whole bin.  Just as a note, we’ve NEVER used this as I just didn’t sit right with us.  Perhaps in a pinch we would but it’s not on our normal list for bedding.