Compost Compost is formed in nature all the time as plants and animals die and decompose. This natural compost is generally called humus.
Decomposition involves the breakdown of plant and animal remains into simpler components.
As a result nutrients, which are essential for plant growth, are released into the soil. Decomposition is brought about by the action of decomposers which include bacteria, fungi, and earthworms. The process of decomposition is essential for the recycling of nutrients. By making compost in our gardens we imitate nature and ensure that our gardens are healthy and productive. Compost returns nutrients to the soil, increases the soil's ability to hold water and air, and prevents erosion by binding the soil.