Can corn cobs and corn kernels go in your worm bin?
The corn cob itself is not suitable for your Bonter worm bin and should preferably not be added. The cob is extremely fibrous and woody and breaks down far too slowly for a worm bin. Corn kernels (cooked or raw) can be added in very small quantities but require attention. Husks and silk are fibrous and digest slowly.
What happens if you add sweet corn?
If you add a corn cob to your Bonter, it will hardly break down and will remain in the bin as undigested material. This takes up space and can disrupt the process. Corn kernels can ferment before they digest properly, which can cause unpleasant odors and attract fruit flies, despite the Bonter filter. This makes the bin less pleasant for the worms and can slow down composting.
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What to do instead? Alternatives & waste management
Absolutely do not add corn cobs to your Bonter worm bin. The best place for corn cobs is a traditional outdoor compost heap, where they can break down slowly. If you don’t have an outdoor compost heap and your municipality collects organic waste, corn cobs can often be included there. Corn kernels (without the cob) can be added in very small quantities to the Bonter (see tips), or put with the GFL waste. Minimize waste by using corn as fully as possible in the kitchen, for example, by using the cob for broth.
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Tips for safe sweet corn composting
Never add corn cobs to your Bonter worm bin. They are unsuitable for indoor vermicomposting. For the cob, focus on outdoor composting or GFL. If you add corn kernels, do so very sparingly. Mix the kernels with a generous amount of other, more easily digestible waste and plenty of dry bedding material. Bury the mix deep under the top layer to discourage fermentation and fruit flies. Husks and silk (also chopped small) can be added in moderation, but decompose slowly. Your Bonter is ideal for many other kitchen scraps!
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Frequently asked questions about composting sweet corn
Can corn cobs go in the worm bin?
Can corn kernels go in the worm bin?
Can corn cobs go in the municipal GFL bin?
How long does it take for a corn cob to decompose?
Do corn kernels cause odors in the bin?
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