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Worm composting: Your indoor compost guide

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vermicompost helpWorm composting, also known as vermicomposting, is a great way to turn kitchen scraps and organic waste into nutrient-rich compost with the help of worms. Follow these steps to start your worm composting project:

  1. Choose a worm bin: Select a breathable, durable container with drainage holes. You can purchase a ready-made worm bin or make your own using materials such as plastic bins or wooden crates.
  2. Prepare bedding: Worms need a comfortable environment to thrive, so create a bedding layer inside the bin using materials like shredded newspaper, cardboard, coconut coir, or aged compost. Moisten the bedding material until it feels like a damp sponge.
  3. Add worms: Redworms (Eisenia fetida or Lumbricus rubellus) are the most commonly used for vermicomposting. Add a handful of worms to the bedding surface, and they will naturally multiply as they eat and reproduce.
  4. Feed the worms: Worms consume kitchen scraps such as fruit and vegetable peelings, coffee grounds, tea bags, and crushed eggshells. Avoid adding meat, dairy, oily foods, or anything non-organic, as these items can attract pests and cause unpleasant odours. Bury the food scraps under the bedding to prevent fruit flies and odour issues.
  5. Maintain the moisture level: Worms need a moist environment, so checking the moisture level periodically is essential. If the bedding feels dry, lightly mist it with water. Add dry bedding materials to absorb excess moisture if it becomes too wet.
  6. Provide proper aeration: Worms require oxygen to survive, so adequate airflow in the bin is essential. You can occasionally mix the bin’s contents with a garden fork or create tiny holes in the lid.
  7. Harvest the compost: Over time, the worms will convert the organic matter into rich and dark worm castings, which is the end product you aim for. Once most of the bin’s contents have been transformed into compost, you can harvest it by separating the worms from the castings.

The easiest harvesting method is to move a large portion of finished compost to one side of the container and then place fresh waste on the other. Over the next few days, the worms should migrate to the new compost, leaving fresh compost on the other side.

Remember, successful vermicomposting requires some attention and care. Monitor the temperature, avoid overfeeding, and maintain a suitable environment for the worms. In return, you’ll get nutrient-rich compost that can improve the soil fertility of your garden or potted plants.

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