Composting is one of the simplest ways to reduce household waste while creating a valuable resource for your garden. Food scraps, leaves, grass clippings, and other organic materials naturally break down into compost, a nutrient-rich soil amendment that improves soil health, helps plants grow, and supports beneficial organisms beneath the surface.

Every compost pile begins with the same process found in nature. Fallen leaves, dead plants, and other organic materials slowly decompose on the forest floor, returning nutrients to the soil. Composting simply speeds up that natural cycle in a controlled environment.

People often assume composting requires a large backyard, expensive equipment, or years of gardening experience. In reality, composting can work in nearly any living situation. Backyard piles, tumblers, worm bins, Bokashi systems, and community composting programs all offer practical ways to recycle food and yard waste.

This guide covers everything beginners need to know, including:

• What compost is

• Why composting matters

• Different composting methods

• What can and cannot be composted

• How to build a healthy compost pile

• Common composting myths

• Ways to use finished compost throughout the garden

Let's begin with the basics.

What Is Compost?

Compost is organic material that has decomposed into a dark, crumbly, earthy-smelling soil amendment. It forms through the work of billions of bacteria, fungi, insects, worms, and other natural decomposers that recycle dead plant material and food waste.

Rather than feeding plants directly like many fertilizers, compost improves the soil itself. Healthy soil contains living organisms that recycle nutrients, improve soil structure, increase water retention, and create an environment where plants thrive. Finished compost can help:

• Improve soil structure

• Increase water retention

• Reduce soil compaction

• Feed beneficial soil organisms

• Add organic matter

• Support healthier plant growth

Curious about the living organisms inside compost? Explore our guides on Nature's Decomposers in Your Garden, What Is Mycelium?, and What Is Healthy Soil? to learn how healthy soil functions as a living ecosystem.

Why Compost?

Composting offers benefits that extend far beyond the garden. Every banana peel, coffee ground, apple core, handful of leaves, or grass clipping placed into a compost pile becomes part of a natural recycling system instead of contributing to landfill waste.

Reduce Food Waste

Food waste remains one of the largest materials entering landfills across the United States. Composting keeps valuable organic materials in circulation, allowing nutrients to return to the soil instead of becoming waste. Looking for additional ways to reduce waste at home? Our Food Waste Prevention Guide shares practical habits that save money while reducing what goes into the trash.

Build Healthier Soil

Healthy gardens begin with healthy soil. Compost increases organic matter, improves soil structure, and creates ideal conditions for microorganisms that naturally support plant growth. Poor soil often becomes compacted, dries quickly, or struggles to support healthy roots. Adding compost helps restore those conditions over time. Learn how to recognize poor soil in Signs Your Soil Needs Organic Matter and discover practical ways to improve challenging soils in How to Improve Sandy Soil.

Help Conserve Water

Compost acts like a sponge inside the soil. Organic matter improves the soil's ability to absorb rainfall and irrigation while reducing runoff and evaporation. Gardens amended with compost often require less frequent watering during hot weather. Healthy soil also plays an important role in protecting streams, rivers, and groundwater. Learn more in How Healthy Soil Protects Our Water.

Support Pollinators and Wildlife

Healthy soil grows healthier plants. Healthy plants provide food and habitat for bees, butterflies, birds, and countless other organisms that depend on thriving ecosystems.

Composting creates benefits that extend well beyond a single garden.

Save Money

Kitchen scraps and yard waste become valuable resources instead of garbage. Regular compost applications can reduce spending on:

• Bagged soil amendments

• Commercial compost

• Mulch

• Some fertilizers

• Soil conditioners

Compost vs. Fertilizer

Many new gardeners use these terms interchangeably, but they serve different purposes. Fertilizer primarily supplies nutrients to plants. Compost improves the soil itself. Think of compost as investing in long-term soil health. Rich organic matter supports microorganisms, fungi, earthworms, and other decomposers that continuously recycle nutrients. Fertilizer can provide nutrients quickly, while compost builds healthier soil year after year. Our guide Compost vs. Fertilizer: What's the Difference? takes a deeper look at the role each one plays in successful gardening.

Different Types of Composting

No single composting method works best for every home. Available space, food waste volume, budget, and gardening goals all influence the right choice.

Backyard Compost Piles

Backyard compost piles remain one of the simplest and most affordable methods.

Materials are layered together outdoors and gradually decompose through natural microbial activity. Best for:

• Homes with outdoor space

• Vegetable gardens

• Large amounts of yard waste

Advantages

• Low cost

• Easy to expand

• Produces large quantities of compost

Compost Bins

Compost bins contain materials in a smaller footprint while helping keep the compost pile neat and organized. Many homeowners appreciate the cleaner appearance and improved pest management compared to open piles.

Compost Tumblers

Compost tumblers use rotating drums that make mixing compost much easier. Turning the drum introduces oxygen throughout the compost while keeping materials enclosed. Tumblers work well for smaller yards, patios, and gardeners looking for a tidy composting system. Our guide How to Use a Compost Tumbler explains how to get the best results and avoid common mistakes.

Worm Composting

Worm composting, also called vermicomposting, uses composting worms to recycle food scraps. Red wigglers consume food waste and produce nutrient-rich worm castings that make an excellent soil amendment. Many people keep worm bins indoors because healthy systems produce very little odor and require minimal space. Related guides include:

• Worm Composting for Beginners

• What Are Browns, Greens, and Grit in Worm Composting?

• Worm Bin Pests, Smells, and Vermicomposting Problems

• Worm Composting Temperature Guide

• How to Find a Worm Farmer Near You

Bokashi Composting

Bokashi composting uses beneficial microorganisms to ferment food waste inside an airtight container. The fermented material finishes breaking down after burial in soil or after being added to another composting system. This method accepts many food scraps that traditional backyard composting typically avoids. Learn more in How to Bokashi Compost.

Community Composting

Many cities, schools, community gardens, and nonprofit organizations operate composting programs that accept food scraps from local residents. Community composting offers an excellent solution for people without space for a compost pile at home. Our guide How to Choose the Best Composting Method for Your Needs compares every major composting system and helps match each method to different homes, lifestyles, and gardening goals.

What Can You Compost?

Many people think composting has a long list of complicated rules. Most kitchen scraps and yard waste are perfectly suitable for compost. The goal is variety. A diverse mix of materials creates a healthier compost pile and supports a wider range of beneficial microorganisms. Common compostable materials include:

Kitchen Scraps

• Fruit and vegetable scraps

• Coffee grounds

• Most paper coffee filters

• Tea leaves

• Plain rice

• Plain pasta

• Bread

• Eggshells

• Corn cobs

• Nut shells from untreated nuts

Coffee grounds deserve special attention because they are one of the most commonly misunderstood compost ingredients. Although brown in color, they count as a green material because of their nitrogen content. Learn more in Are Coffee Grounds Good for Compost? Here's the Answer. Wondering about citrus? Read Can You Compost Citrus? for practical tips on adding lemons, oranges, and limes to your compost pile.

Yard Waste

Many outdoor materials compost beautifully. Examples include:

• Leaves

• Grass clippings

• Flowers

• Garden trimmings

• Small twigs

• Pine needles

• Weeds that have not gone to seed

Autumn leaves remain one of the best carbon sources available and can be stored for use throughout the year.

Paper Products

Many paper products also compost well. Shredding larger pieces speeds decomposition and improves airflow. Examples include:

• Shredded cardboard

• Plain paper

• Newspaper

• Brown paper bags

• Toilet paper rolls

• Paper towel tubes

• Egg cartons made from paper

What Should Never Go Into Compost?

Some materials create problems because they attract pests, introduce pathogens, or simply break down very slowly. Avoid adding:

• Pressure-treated wood

• Plastic

• Glass

• Metal

Some materials fall into a gray area. Meat, citrus, compostable packaging, and oils often create more questions than answers. Our guide Stop! Don't Compost These Everyday Items explains many of the surprising materials that belong in the trash instead of the compost pile.

Curious about meat and bones? Read our guide to Composting Meat and Bones before adding them to your compost system.

Browns vs. Greens

One of the most important concepts in composting involves balancing greens and browns. Greens provide nitrogen. Browns provide carbon. Both are essential.

Common Green Materials

• Fruit scraps

• Vegetable scraps

• Coffee grounds

• Grass clippings

• Fresh garden trimmings

Common Brown Materials

• Dry leaves

• Cardboard

• Newspaper

• Straw

• Untreated wood chips

• Paper

A compost pile containing mostly greens often becomes wet, dense, and smelly. A pile containing mostly browns breaks down much more slowly. The healthiest compost contains a steady supply of both.

Choosing the Right Compost Bin

Many beginners spend weeks researching compost bins before getting started.

The truth is that the best compost bin is the one you'll actually use.

Backyard Compost Bin

Great for homeowners with outdoor space. Works well for:

• Yard waste

• Garden cleanup

• Kitchen scraps

• Large households

Compost Tumbler

A compost tumbler keeps materials enclosed and makes turning easier. Ideal for:

• Smaller yards

• Homeowners

• Beginners

• HOA communities

Worm Bin

A worm bin takes very little space and works well indoors. Popular among:

• Apartment residents

• Schools

• Classrooms

• Families

• Offices

Community Composting

Many cities, botanical gardens, farmers markets, and nonprofit organizations accept food scraps through community composting programs. This option works especially well for people without outdoor space.

Building Your First Compost Pile

Getting started requires only a few simple steps.

Step 1: Add Browns First

Begin with several inches of carbon-rich materials such as leaves or shredded cardboard. This layer improves airflow and drainage.

Step 2: Add Greens

Spread kitchen scraps across the browns instead of dumping everything into one location. Small pieces break down faster than large ones.

Step 3: Continue Layering

Alternate greens and browns as new materials become available. The pile does not need perfect layers. Variety matters far more than precision.

Step 4: Maintain Moisture

A healthy compost pile feels similar to a wrung-out sponge. Too much water fills the air spaces that microorganisms need. Too little moisture slows decomposition dramatically.

Step 5: Add Oxygen

Turning the pile every week or two introduces fresh oxygen that supports aerobic microorganisms. Better airflow usually means faster decomposition and fewer odor problems. Strong odors often signal an imbalance rather than a failed compost pile.

How Long Does Compost Take?

Every compost pile moves at its own pace. Several factors influence the timeline, including:

• Composting method

• Outdoor temperature

• Moisture

• Airflow

• Material size

• Frequency of turning

General estimates include:

• Hot composting: about 1 to 3 months

• Compost tumblers: about 2 to 6 months

• Backyard compost piles: about 3 to 12 months

• Cold composting: 6 months to more than a year

• Worm composting: about 2 to 6 months

Cold weather also slows microbial activity, but composting never completely stops.

Common Composting Myths

Composting has been around for thousands of years, yet many misconceptions still discourage people from getting started. The good news is that composting is far more forgiving than most beginners expect. Here are some of the most common myths.

Myth: Compost Always Smells Bad

A healthy compost pile smells earthy, similar to rich garden soil. Strong odors usually point to an imbalance rather than a failed compost pile. Excess moisture, too many green materials, or poor airflow often create unpleasant smells. Most odor problems can be solved by adding more browns, turning the pile, or improving drainage.

Myth: Compost Attracts Rats and Other Pests

A properly managed compost pile does not automatically attract pests. Most unwanted visitors appear because food scraps remain exposed or because meat, grease, or other inappropriate materials were added. Covering food scraps with browns and using a secure compost bin greatly reduces pest issues.

Myth: Composting Requires a Large Backyard

Composting works almost anywhere. Many successful composters live in apartments, condominiums, or homes with very small yards. Popular options include:

• Worm bins

• Compost tumblers

• Bokashi systems

• Community composting programs

Myth: Compost Needs to Be Turned Every Day

Regular turning speeds decomposition, but daily turning is unnecessary. Many backyard compost piles produce excellent compost with occasional mixing. Cold composting requires even less maintenance.

Myth: Composting Is Expensive

Nature composts without specialized equipment. A compost pile can begin with little more than leaves, food scraps, and a small outdoor space. Many people eventually purchase compost bins or tumblers for convenience, but neither is required.

Myth: Coffee Grounds Are Too Acidic

This remains one of the most common composting myths. Used coffee grounds are an excellent compost ingredient and count as a green material because they contain nitrogen. Most of the acidity leaves during brewing, making used coffee grounds suitable for most compost systems.

Myth: Compost Is the Same as Dirt

Soil, dirt, and compost all serve different purposes. Compost is living organic matter that improves soil health over time. Healthy soil contains minerals, organic matter, water, air, fungi, bacteria, worms, and countless other living organisms working together.

How to Tell When Compost Is Finished

Finished compost looks very different from the materials that started the process. Signs your compost is ready include:

• Dark brown to nearly black color

• Crumbly texture

• Pleasant earthy smell

• Few recognizable food scraps

• Loose, uniform appearance

Large sticks, avocado pits, or small wood pieces may remain. Screening or sifting compost removes larger materials that can continue decomposing in the next batch.

Our guide How to Separate Finished Worm Compost demonstrates one simple way to separate finished compost from larger materials and active worms.

Still seeing partially decomposed materials? Don't throw them away. Read Half-Finished Compost? Don't Toss It for practical next steps. Older compost can still provide value in many situations. Our article Can You Use Old Compost? explains when it's still beneficial and when fresh compost makes more sense.

How to Use Finished Compost

One of the biggest rewards of composting comes from putting finished compost back to work. Compost improves soil across many different gardening projects.

Vegetable Gardens

Mix compost into garden beds before planting to improve soil structure, increase organic matter, and support healthy root growth.

Raised Beds

Blend compost into raised beds each growing season to replace nutrients used by previous crops.

Trees and Shrubs

Spread compost around the root zone of established trees and shrubs to improve soil over time. Fruit trees often benefit from annual compost applications.

Flower Gardens

Compost supports healthy flowers by improving moisture retention and creating healthier soil conditions.

Houseplants

Small amounts of finished compost can be blended into potting mixes for many houseplants. Use moderation because container plants require excellent drainage.

Native Plants

Many gardeners assume every plant benefits from compost. Some native plants naturally thrive in nutrient-poor soils and may perform better with little or no compost.

Our guide Should You Add Compost to Native Plants? explains when compost helps and when it can become unnecessary.

Compost Tea

Some gardeners steep finished compost in water to create compost tea for watering plants. Research on compost tea continues to evolve, but many gardeners enjoy using it as part of a broader soil health program. Learn more in What Is Compost Tea? 

Start with Scraps

Every compost pile begins with a handful of food scraps and a willingness to learn.

Perfection isn't the goal. Healthy compost develops through observation, small adjustments, and time. Nature handles the hard work. Your role simply involves providing organic materials, maintaining reasonable moisture, and giving microorganisms the conditions they need to thrive. Over time, those banana peels, coffee grounds, autumn leaves, and garden trimmings become one of the most valuable resources for building healthier soil.

About Let’s Go Compost

Let’s Go Compost is a national nonprofit making composting simple, affordable, and accessible. Our programs bring hands-on composting to communities, helping people turn food and plant waste into healthy soil that supports food systems, native plant ecosystems, and pollinators. Learn more at letsgocompost.org and support our work at letsgocompost.org/donate.