How Red Wigglers Really Eat: The Power of Fungi & Bacteria

Red wiggler compost worms don’t have teeth and they don’t chew like we do. In a healthy worm bin, fungi and bacteria do the first job of breaking down organic matter so worms can finally eat it and turn it into rich, black worm castings.

Step 1: Fungi Move In First

When you add kitchen scraps, cardboard, and leaves to your worm bin, they are too tough for worms to eat right away. Fungi – like molds and natural soil fungi – attach to this material and start the decomposition process.

• Fungi grow on leaves, cardboard, and vegetable scraps.
• They release enzymes that soften and break apart plant fibers.
• This turns tough material into something soft and flexible.

Without fungi, food sits there and rots slowly. With fungi, food becomes soft and ready for the next helpers: bacteria.

Step 2: Helpful Bacteria Multiply

After fungi have started the job, beneficial bacteria move in and explode in number. These microbes coat the softened material in living biofilms – this is the “slime” that worms actually love to eat.

• Bacteria finish breaking food into tiny particles.
• They create heat and biological activity in the bin.
• They cover food surfaces with a living layer of microbes.

Red wiggler worms are really microbe eaters. They don’t just eat the food – they eat the food that is covered in bacteria.

Step 3: Worms Eat the Microbe-Rich Material

Now the food is finally ready. The fungi and bacteria have turned your scraps into soft, microbe-rich material. The worms pull this material into their mouths and swallow it whole.

• Worms ingest the soft, microbe-covered material.
• A gizzard inside the worm grinds it with small bits of grit.
• Beneficial bacteria continue digesting the material in the worm’s gut.

What comes out the other end is worm castings – dark, crumbly, biologically active particles that are packed with nutrients and living microbes. This is what makes Skip Jack Worm Castings so powerful for gardens and plants.

Why This Matters for Your Garden

When fungi and bacteria are working correctly in a worm bin, you get:

• Faster composting – food disappears quickly.
• Happy, reproducing worms – plenty of cocoons and baby worms.
• High-quality worm castings – rich, dark, and crumbly.
• Stronger plants – roots are surrounded by beneficial microbes.

Healthy microbes in your worm bin become healthy microbes in your soil. That is why gardeners love using worm castings around vegetables, flowers, and container plants.

How to Encourage Fungi & Bacteria in Your Worm Bin

• Keep bedding moist but not soggy – like a wrung-out sponge.
• Mix browns (cardboard, paper, dry leaves) with greens (food scraps).
• Bury food slightly under the bedding to keep it from drying out.
• Avoid salty, oily, or spicy foods that can harm worms and microbes.
• Add a handful of garden soil or finished compost to boost biology.
• Keep the bin between about 55°F and 85°F for best results.

Do these simple things and you’ll see white fungal threads and active microbes in your bin – a sure sign that your worms are getting the food they need.

Quick FAQ

Do worms eat food scraps directly?
Not at first. Fungi and bacteria must soften and pre-digest the material before worms can eat it comfortably.

Is mold in the worm bin bad?
A light, white fuzz on food is usually fungal growth – a normal and healthy part of the process. Extremely thick, colored, or smelly mold can mean too much food or not enough airflow.

Why are worm castings so good for plants?
Because they are full of living microbes, gentle nutrients, and beneficial compounds that help roots absorb food and resist stress. Castings are one of the safest and most natural ways to feed your soil.

When you buy red wiggler worms or Skip Jack Worm Castings from us, you are putting this entire natural system of fungi, bacteria, and worms to work for your garden.