What makes composting worms unique?
Composting worms are fundamentally different from their garden-dwelling relatives, almost like two different professions within the same family. The common earthworm you find in your garden is a ‘burrower,’ adapted to tunnel deep, aerating the soil as it moves through it. They prefer soil to dense organic matter.
Composting worms, however, are ‘surface-dwellers.’ Their entire biology and behavior are specialized for living in the top layer of highly concentrated organic material—like a pile of autumn leaves or, in this case, a composter. This dynamic environment, rich with food, is exactly where they thrive, making them nature’s perfect recycling specialists.
They are surface feeders
Unlike garden worms that burrow deep, composting worms live and feed in the top layers of organic material. This means they stay exactly where you add your food scraps, processing them efficiently.
They thrive in communities
These species are happy to live in dense populations. This communal nature is key to a productive system, as thousands of worms work together in a small space.
They have voracious appetites
Under the right conditions, a composting worm can eat about half its body weight in organic matter each day. They are nature’s most efficient recyclers.
They reproduce to fit their home
A worm population self-regulates. They will reproduce to match the size of their bin and the amount of food available, creating a stable, balanced ecosystem.
Creating the ideal home for your worms.
To ensure your worms are healthy and productive, their environment needs to be perfectly balanced for the species you’re using—most commonly, the highly efficient Eisenia fetida (also known as the Red Wiggler). It’s less about constant work and more about getting their initial setup right. A healthy home for these worms is a quiet, odor-free, and efficient home.
Bedding: More than just a home
Preparation is minimal for apple scraps. Simply chop larger cores or peels into smaller pieces (e.g., 2-5 cm) to help worms process them faster. Always bury them under the bedding layer to discourage fruit flies, although apple is less attractive than more sugary fruits.
The bedding is the foundation of your bin. It’s where your worms live, breed, and retreat to when they’re not feeding. Materials like shredded cardboard, coconut coir, or aged leaves provide a carbon-rich, airy structure that balances the nitrogen-rich food scraps. The bedding should be as moist as a wrung-out sponge—not dry, but definitely not soaking wet.
Moisture: Essential for breathing
Worms don’t have lungs; they breathe through their skin. This is only possible if their skin is moist. The moisture from food scraps usually maintains the right level, but it’s important to avoid letting the bin get too dry or too waterlogged. A well-balanced bin manages its own moisture, but adding dry bedding can easily correct any excess wetness.
Food: A consistent, balanced diet
Worms enjoy a varied diet of fruit and vegetable scraps, coffee grounds, and crushed eggshells. It’s best to bury new food scraps under the bedding. This keeps the food accessible to the worms, discourages fruit flies, and prevents odors. Avoid adding large amounts of meat, dairy, or oily foods, as these are difficult for the worms to process and can cause problems.
How many worms do I need to start?
The number of worms you need depends on how much food waste your household produces and your bin’s dimensions. A common starting point for one or two people is about 250-500 grams of worms. However, it’s better to start with slightly fewer than you think you need. The population will grow naturally to match your feeding habits, which creates a more stable system in the long run than starting with too many.
To get a personalized recommendation based on your bin dimensions, you can use our simple calculator.
Bonter One fits into daily life
Step 1 – Add
Drop your daily fruit and veggie scraps into the top opening of Bonter One.
Step 2 – Transform
Worms and microbes get to work. Silently, without electricity or odor.
Step 3 – Give back
Harvest rich, living compost to feed your plants or share with others.
Frequently asked questions
Will the worms try to escape?
Do they reproduce? Will I have too many?
Where can I get composting worms?
Can I use worms from my garden?
Perfect for lush indoor plants, the garden, or sharing with the community.
Vegetables
From peels to stems, most vegetable scraps are a perfect meal for your composter.
Fruits
Cores, peels, and rinds provide the energy needed for a healthy, active system.
Household items
Coffee grounds, tea bags, and eggshells add valuable nutrients to your final compost.
