Every compost pile is different, and depending on different circumstances, the pile could be ready to add to the garden in a matter of months, or it could be over a year before it is ready.
The process behind composting is basically breaking down larger green and brown matter (kitchen and/or yard scraps) into soil-like matter. To do this, a compost pile must be aerated by being turned, so that it doesn’t rot, and so each layer is exposed to the right amount of sun and air. A compost pile must also “cook” and get hot from the sun so it can break down. To reduce the amount of time it takes to break down, kitchen scraps can be chopped up before being added to the pile.
Compost is ready to add to the garden when it looks dark and crumbly, and none of the starting materials are visible such as egg shells, banana peels, etc. To be sure the compost is ready, an easy test can be done by putting a small amount of the compost in a sealed bag, leave it in there for 24 to 48 hours, and then open it and notice the smell. If there is little to no odor coming from the bag, then the compost is ready to disperse in the garden.