What exactly is composting, and how does it work?
Composting is the process of decomposing organic materials into rich, nurturing fertilizer. Materials are typically a mix of carbon-rich brown matter (straw, fabric, sawdust, wood chips) and nitrogen-rich green matter (grass clippings, coffee grounds, eggshells). The carbon and nitrogen found in compost is a critical food source for healthy microbes that allow for thriving soil.
There are four common methods: hot pile, cold, vermicomposting and electric cycling.
Hot pile, or aerobic, involves tossing green and brown matter into an open pile exposed to oxygen and water. This pile becomes “hot” (ideally 160°F) as bacterial microbes decompose the matter rapidly. However, overheating can cause mold or destroy healthy microbes, so you’ll need to flip the pile consistently to ensure even distribution of moisture and heat. This takes roughly six to nine months to produce fertilizer.
Cold composting, or passive composting, is a simpler but slower method. Just mix brown and green matter in your compost and let everything decompose into fertilizer over a year or two. However, while less work, this approach can lead to development of unpleasant smells, bacteria, fungi or parasites.
The third method, vermicomposting, is done in an enclosed bin. Organic matter is added to a bed of scrap paper, straw or hay. Then, worms are added to break it down. The worms eat the scraps and their feces becomes a dark, rich compost material called humus. Vermicomposting is generally more expensive than hot pile, but it can be a more flexible option as it can be done indoors or outdoors. Plus, it’s much faster, taking only two to three months to produce compost.
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