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COMPOSTING LIBRARY:
The Basics

This guide will help you to quickly learn the basics of composting and start creating high-quality compost.

 

It's important to manage variables, such as aeration, moisture, and the proper balance of inputs, to ensure a successful composting experience.

The size of your compost pile can make a big difference. A pile that's too small struggles to retain heat and moisture, which are essential for the microbes that break down organic matter. Aim for a pile around 1 cubic yard in size—it's large enough to stay warm in most climates, yet small enough to manage easily. You'll be surprised at how much more efficiently your compost pile works once it reaches this ideal size.

Aeration is the process of regularly turning the compost pile to allow oxygen to mix with the material, which helps speed up the decomposition process. 

 

Moisture is also important for successful composting, as too much moisture can lead to anaerobic conditions, while too little moisture can slow the decomposition process.  If you can clump it together and it holds without dripping, you're doing pretty well.

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Feed Stocks refer to the organic materials used when composting, such as vegetable and fruit scraps, leaves, and grass clippings.  A balance of green materials (nitrogen-rich)  and brown materials (carbon-rich) is needed to maximize efficiency.  There are MANY opinions as to the best ratio.  At a minimum, you'll want a 1:1 ratio of brown to green materials.  A higher brown content (up to 4:1) will keep odors down while providing more carbon to the microbial population.  If you have more green material than brown material, expect odors and pests.

Feed Stocks are the organic materials you use for composting, like fruit and vegetable scraps, leaves, and grass clippings. The key to successful composting is balancing "green" materials (nitrogen-rich) with "brown" materials (carbon-rich). While there's no single "perfect" ratio, aim for at least a 1:1 ratio of brown to green materials. A higher proportion of brown materials (up to 4:1) can help reduce odors and provide ample carbon for the microbes that drive the composting process. On the other hand, an excess of green materials can lead to unpleasant odors and attract pests.

In the image below, browns and greens were layered, alternating until the piles were full.  The older pile on the right has nearly finished composting.  You can see some of the brown feed stocks (straw in this case) have not been fully broken down.  No worries.  They will be sifted out and composted again.  You can also see how much the piles can reduce over time.  As materials are broken down and moisture is naturally reduced, the piles will shrink to as little as half of their original volume. 

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The temperature of your pile will tell a lot about what's going on inside.  A good long-stem compost thermometer is a valuable tool.  A healthy and active pile may range anywhere from 100 to 160 degrees Fahrenheit.  These temperatures will spike shortly after mixing the greens and browns together, as microbial activity increases.  As oxygen and moisture are depleted, the temperature will begin to drop.  This let's you know it's time to turn your piles.  This means, you need to mix everything up again to allow oxygen to be reintroduced.  You'll also want to add moisture, as necessary, to keep the pile cooking.  Add water until the materials can be clumped together in your hand without dripping.

In the STEP UP YOUR GAME section of the compost library, we'll go into options that will improve aeration and moisture control in order to keep your piles cooking longer, and with less effort.  From aeration pipes to moisture control coverings, there are several inexpensive ways to improve your compost's quality and reduce labor on a budget (maybe even FREE).

 

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