Jun 20, 2023 · It can either be dug in or used as a type of mulch, layered on the soil to be broken down by the weather, beneficial microbes and worms.. Compost is made by mixing woody and ‘green’ materials in either a composter, which are easy to make, a plastic compost bin like this 80 gallon one by F2C on Amazon, or a compost tumbler such as this handy dual chamber compost tumbler, also on Amazon.