


It will be dark brown, almost black, and moist, yet crumbly.

The worms will eat and digest the food and yard waste into nutrient-dense manure. Worm castings are ready to harvest when the organic material is all broken down and there’s nothing left that you can really identify. Worm bins take several months to fill up and for the worms to eat through, but when you notice the castings look ready to harvest, you can start to prepare the bin and your materials based on your preferred harvesting method.
