Backyard Composting: A Complete Guide

Why Compost?

Composting offers numerous benefits for both the environment and your garden:

• Reduces waste: Composting diverts approximately 30% of household waste from landfills, significantly reducing methane emissions.
• Improves soil health: Compost enriches soil by providing essential nutrients and improving soil structure.
• Conserves water: Compost-enhanced soil retains moisture better, reducing the need for frequent watering.
• Saves money: By creating your own compost, you reduce the need to purchase fertilizers and soil amendments.
• Supports beneficial organisms: Compost introduces beneficial microbes and earthworms that help plants thrive.
• Reduces chemical usage: Healthy, compost-amended soil naturally resists pests and diseases better.

Understanding the Composting Process

Composting is nature's way of recycling organic matter. It's a controlled decomposition process where microorganisms break down organic material into humus, the rich, dark component of soil. The composting process requires:

• Organic materials: A mix of green (nitrogen-rich) and brown (carbon-rich) materials.
• Moisture: The right amount of water to keep microorganisms active.
• Oxygen: Regular aeration to maintain aerobic conditions.
• Temperature: Heat generated during the decomposition process, ideally between 110-160F (43-71C).

When these elements are properly balanced, microorganisms efficiently break down materials, producing nutrient-rich compost in three to nine months, depending on the method and conditions.

Choosing a Composting Method

There are several composting methods to choose from, each with its own advantages:

1. Pile Composting

The simplest approach involves creating a pile of organic materials in a designated area. This method is ideal for those with space and abundance of yard waste. While it requires minimal investment, it may take longer and need more active management than other methods.

2. Bin Composting

Using a bin helps contain compost materials, retains heat better, and provides a neater appearance. Bins can be purchased or made from wire mesh, wooden pallets, or plastic containers. This method works well in suburban environments and offers faster decomposition than open piles.

3. Tumbler Composting

Tumblers are enclosed barrels mounted on a frame that can be rotated to aerate the compost easily. They offer the fastest decomposition time (often just a few weeks in ideal conditions), protect compost from pests, and make turning effortless. However, they have limited capacity and can be expensive.

4. Vermicomposting

Using worms (usually red wigglers) to break down organic matter, this method works well indoors or in small spaces like apartments. Vermicompost is exceptionally rich in nutrients and microorganisms, making it perfect for houseplants or small gardens.

What to Compost

Successful composting requires a good balance of "green" materials (nitrogen-rich) and "brown" materials (carbon-rich). A general rule of thumb is to aim for about 3 parts brown materials to 1 part green materials by volume.

Green Materials (Nitrogen)	Brown Materials (Carbon)
Fruit and vegetable scraps	Dried leaves
Grass clippings	Twigs and small branches
Plant trimmings	Straw or hay
Coffee grounds (including paper filters)	Sawdust (from untreated wood)
Tea bags	Shredded newspaper
Eggshells (crushed)	Cardboard (non-glossy)
Seaweed and kelp	Dried cornstalks

Materials to Avoid

For successful composting and to avoid attracting pests or creating odors, avoid composting:

• Meat, fish, and bones
• Dairy products
• Oily or greasy foods
• Pet waste (dogs, cats)
• Diseased plants
• Weeds that have gone to seed
• Glossy or colored paper
• Synthetic materials
• Treated wood or sawdust

Getting Started With Your Compost

Follow these steps to establish a productive composting system:

1. Select a Location

Choose a level, well-drained area with partial shade. The location should be convenient to your garden and kitchen but not too close to neighbors to avoid potential odor concerns.

2. Set Up Your Composting System

Assemble or build your composting container, or prepare the area for a pile. If using a bin or tumbler, follow the manufacturer's instructions for setup.

3. Add Initial Materials

Start with a layer of coarse brown materials like twigs to promote drainage. Alternate layers of green and brown materials, moistening each layer as you add it.

4. Maintain Your Compost

Regularly check moisture levels (should be like a damp sponge), turn the pile to add oxygen, and add materials in the appropriate ratios. The frequency of turning depends on your methodfrom every few days for tumblers to every few weeks for piles.

5. Harvest Your Compost

When the material is dark, crumbly, and has an earthy smell, it's ready to use. This typically takes anywhere from three months to a year, depending on your method and maintenance.

Troubleshooting Common Compost Issues

Even experienced composters encounter challenges. Here are solutions to common problems:

Bad Odor

Problem: Foul-smelling compost usually indicates anaerobic conditions or excess nitrogen.

Solution: Turn the compost to add oxygen, add more brown materials, and ensure proper drainage. Avoid adding too much wet, nitrogen-rich material at once.

Pests

Problem: Flies, rodents, or other pests attracted to compost.

Solution: Bury food scraps under brown materials, use a sealed bin, and avoid composting meat, dairy, or oily foods. Turn the pile regularly to disturb pests.

Compost is Too Dry

Problem: Decomposition slows when moisture is insufficient.

Solution: Add water while turning materials. Aim for the consistency of a wrung-out sponge.

Compost is Too Wet

Problem: Excess moisture creates anaerobic conditions and odors.

Solution: Add dry brown materials, turn the pile to increase aeration, and improve drainage if necessary.

Slow Decomposition

Problem: Compost isn't breaking down as expected.

Solution: Ensure proper green/brown ratio, shred larger materials, increase aeration by turning more frequently, and check that moisture levels are adequate.

Using Your Finished Compost

Once your compost is ready, there are many ways to use it in your garden:

Soil Amendment

Mix 2-3 inches of compost into your garden soil before planting to improve structure and fertility.

Mulch

Apply a 1-2 inch layer of compost around plants to retain moisture, suppress weeds, and slowly release nutrients.

Compost Tea

Steep finished compost in water to create a liquid fertilizer. Dilute and apply to plants' root systems or as a foliar spray.

Potting Mix

Combine compost with other ingredients like perlite and peat moss to create a nutrient-rich potting soil for containers.

Lawn Topdressing

Spread a thin layer of finely-screened compost over your lawn to improve soil health without disturbing the grass.

Advanced Composting Techniques

Once you've mastered the basics, you might want to explore more sophisticated techniques:

Hot Composting

This method requires careful management but produces compost in as little as 18 days. It involves building a large pile (at least 3x3x3 feet), monitoring temperatures, and turning the pile when it reaches certain temperature thresholds.

Bokashi Composting

An anaerobic process using special microorganisms to ferment organic waste. It works indoors, handles all food scraps including meat and dairy, and produces a pre-compost that can be buried in the garden.

Sheet Composting

Also known as lasagna gardening, this involves layering organic materials directly on garden areas and allowing them to compost in place, eliminating the need to transport materials.

Hugelkultur

A technique that uses buried logs and branches as a carbon base, creating raised garden beds that retain moisture and nutrients exceptionally well.