17 Frequently Asked Questions About Compost (Best Answers)

Compost is the result of the natural process of decomposing organic matter, such as food scraps, yard waste, and other biodegradable materials.

It is a nutrient-rich soil amendment that can be added to gardens, lawns, and other green spaces to improve soil health and promote plant growth.

Composting is important because it helps divert organic waste from landfills, reduces greenhouse gas emissions, and conserves natural resources.

In addition, composting can save money on waste disposal and fertilizer costs, and it is a sustainable way to create healthy soil for plants.

In this FAQ, we will cover 17 frequently asked questions about composting, including what compost is, how to make it, what materials can be composted, how to troubleshoot composting problems, and more.

Whether you are a seasoned composter or new to the process, this FAQ will provide valuable information and tips to help you create nutrient-rich soil for your green spaces.

 What is Compost? What is Compost?

Table of Contents

What Is Compost?

Definition Of Compost

Compost is a dark, crumbly, and earthy-smelling material that results from the natural decomposition of organic matter, such as food scraps, yard waste, and other biodegradable materials.

It is rich in nutrients, beneficial microorganisms, and humus, making it an excellent soil amendment for plants.

Explanation Of How It’s Made

Compost is made through a process called composting, which involves the breakdown of organic materials by bacteria, fungi, and other microorganisms.

This process produces heat, which accelerates the decomposition of the materials and kills any pathogens or weed seeds that may be present.

Basic Ingredients Needed To Make Compost

To make compost, you need a mixture of “browns” and “greens.” Browns are carbon-rich materials, such as dried leaves, twigs, and straw, that provide structure to the compost pile.

Greens are nitrogen-rich materials, such as grass clippings, food scraps, and garden waste, that provide nutrients to the microorganisms that break down the materials.

In addition to browns and greens, you need water and air to keep the compost pile moist and oxygenated.

The ideal compost pile should have a carbon to nitrogen ratio of about 30:1, and it should be turned regularly to ensure even decomposition and aeration.

With time and proper management, the materials in the compost pile will break down into nutrient-rich soil that can be used to support plant growth.

Why Compost?

Benefits Of Composition

Composting offers a wide range of benefits, including environmental, health, and economic benefits.

Environmental Benefits:

Reduces Waste In Landfills:

Composting diverts organic waste from landfills, which can reduce greenhouse gas emissions and extend the life of landfills. Improves soil health:

Compost adds nutrients to soil and improves its structure, making it more resistant to erosion and better able to retain moisture.

Reduces Water Pollution:

Composting reduces the amount of organic waste that can end up in waterways, reducing the risk of water pollution.

Reduces The Need For Synthetic Fertilizers:

Compost provides a natural source of nutrients to plants, reducing the need for synthetic fertilizers that can have negative impacts on the environment.

Health Benefits:

Reduces Exposure To Harmful Chemicals:

Composting reduces the amount of pesticides and synthetic fertilizers used in gardens and lawns, reducing exposure to harmful chemicals.

Promotes Healthy Soil:

Compost helps support healthy soil, which can lead to healthier plants, better air quality, and improved water quality.

Economic Benefits:

Reduces Waste Disposal Costs:

Composting can reduce the amount of waste that needs to be disposed of, potentially saving money on waste disposal costs.

Saves Money On Fertilizer:

Compost provides a natural source of nutrients to plants, reducing the need for synthetic fertilizers.

Improves Crop Yields:

Compost can improve soil health, leading to increased crop yields and potentially higher profits for farmers.
Overall, composting is a sustainable practice that offers a wide range of benefits to both the environment and human health.

Benefits of composition

How To Compost

Overview Of The Composting Process

Composting is a natural process that can be done in several ways, but the basic process involves the following steps:

Collect Organic Waste:

Collect organic waste such as food scraps, yard waste, and other biodegradable materials.

Build A Compost Pile:

Build a compost pile with a mix of “browns” and “greens” in a ratio of 30:1, ensuring the pile is moist and aerated.

Monitor And Maintain The Pile:

Monitor the temperature, moisture, and aeration of the pile and make adjustments as necessary.

Harvest The Compost:

Harvest the compost once it has broken down into a dark, crumbly material.

Composting Methods (e.g. hot composting, cold composting, vermicomposting)

There are several composting methods to choose from, including:

Hot Composting:

This method involves building a large compost pile that heats up quickly, reaching temperatures of 130-150 degrees Fahrenheit. This process is ideal for breaking down large amounts of organic waste quickly and killing weed seeds and pathogens.

Cold Composting:

This method involves building a smaller compost pile and allowing it to break down over a longer period of time. This process is less intensive and ideal for those who want to compost without much effort.


This method involves using worms to break down organic waste in a worm bin. This process is ideal for those with limited space and can produce high-quality compost quickly.

How to Compost

Tips For Successful Composting

  • To ensure successful composting, here are some tips to keep in mind:
  • Maintain a balanced carbon to nitrogen ratio of 30:1 in the compost pile.
  • Keep the pile moist and aerated, but not too wet or too dry.
  • Chop or shred large materials to speed up decomposition.
  • Turn the pile regularly to ensure even decomposition and aeration.
  • Avoid adding meat, dairy, or oily foods to the compost pile as they can attract pests and slow down decomposition.

What To Compost

List Of Compostable Materials:

  1. Fruit and vegetable scraps
  2. Coffee grounds and filters
  3. Tea bags
  4. Eggshell’s
  5. Grass clippings
  6. Leaves
  7. Wood chips
  8. Sawdust
  9. Shredded newspaper
  10. Cardboard
  11. Dryer lint
  12. Hair and fur
  13. Cotton and wool fabrics
  14. Manure from herbivores

What Cannot Be Composted:

  1. meat, fish, and poultry
  2. Dairy products
  3. Greasy foods
  4. Fats and oils
  5. Bones
  6. Charcoal ash
  7. Diseased plants
  8. Pet waste
  9. Synthetic materials
  10. Coal and coke a

Compostable Materials

It is important to remember that while some materials may be compostable, they may take longer to break down or require specific composting conditions.

For example; citrus peels and onion skins are compostable, but they are slow to break down and may require chopping or shredding before adding to the compost pile.

Additionally, some materials such as grass clippings and leaves may need to be balanced with other materials, such as wood chips or shredded newspaper, to maintain a healthy compost pile.

It is important to research the composting requirements of specific materials before adding them to the compost pile.

What Not To Compost

List Of non-compostable Material

  1. Meat, fish, and poultry
  2. Dairy products
  3. Greasy foods
  4. Fats and oils
  5. Bones
  6. Charcoal ash
  7. Diseased plants
  8. Pet waste
  9. Synthetic materials
  10. Coal and coke ash

 Explanation Of Why They Can’t Be Composted

These materials cannot be composted because they can attract pests, create foul odors, and/or introduce harmful pathogens into the compost pile.

For example; meat, fish, and poultry can attract rodents and other animals, while pet waste can contain harmful bacteria and parasites that can survive in the compost pile and potentially contaminate the resulting compost.

Non-Compostable Materials:

Synthetic materials, such as plastics or rubber, do not break down naturally and can also contaminate the compost.

Additionally, coal and coke ash can contain toxic materials that are harmful to plants and animals, and can also create an alkaline compost that is not suitable for many plants.

It is important to carefully select materials that are suitable for composting to ensure that the resulting compost is healthy and safe

How Long Does Composting Take?

Composting time can vary depending on several factors such as the composting method, the size of the pile, and the materials being composted.

Average Composting Time

On average, composting can take anywhere from two months to two years to complete, depending on the composting conditions.

Hot Composting, which involves maintaining high temperatures of 130-150 degrees Fahrenheit, can produce finished compost in as little as a few weeks to a few months.

Cold Composting, which relies on natural decomposition without much intervention, can take up to two years to produce finished compost.

Factors That Can Affect Composting Time Include:

The Size Of The Compost Pile:

Larger piles can generate more heat and decompose faster than smaller piles.

The Carbon-To-Nitrogen Ratio:

A balanced ratio of 30:1 can speed up decomposition and produce finished compost more quickly.

Moisture Levels:

A compost pile that is too wet or too dry can slow down decomposition.


Turning the compost pile regularly can help to ensure even decomposition and aeration.

Composting Method:

Different composting methods can produce compost at different rates.Hot composting can produce compost more quickly than cold composting.

In general, maintaining optimal composting conditions can help to speed up the composting process and produce finished compost more quickly.

Explanation of how to apply compost to your garden or lawn

Ways To Use Compost

How to Use Compost

As A Soil Amendment:

Compost can be mixed into soil to improve its structure, texture, and nutrient content.

As A Mulch:

Compost can be spread on top of soil as a protective layer to help retain moisture and suppress weeds.

As A Top Dressing:

Compost can be spread on top of existing plants to add nutrients and improve soil health.

How To Apply Compost To Your Garden Or Lawn:

For Soil Amendment:

Mix compost into the top 6-8 inches of soil before planting. Use a garden fork or tiller to incorporate the compost evenly.

For Mulch:

Spread a layer of compost on top of soil, taking care to leave a few inches of space around plant stems to prevent rot. Apply a layer 1-2 inches thick for best results.

For Top Dressing:

Spread a thin layer of compost on top of existing plants, taking care not to cover the leaves or stems. Use a rake or garden fork to gently work the compost into the soil.

It is important to note that compost can be very nutrient-rich, and too much of it can harm plants. As a general rule, apply no more than 1 inch of compost per year to your lawn or garden, and monitor plant growth to ensure that they are not becoming over-fertilized.

Can I Compost In Winter?

Explanation Of Winter Composting

Yes, it is possible to compost in the winter, although the process may be slower than during warmer months. In winter, colder temperatures and decreased microbial activity can slow down the composting process. However, with some adjustments, composting can still be successful during the winter months.

Tips For Successful Winter Composting:

Insulate Your Compost Pile:

A layer of straw, leaves, or other insulating materials can help to maintain the warmth of the compost pile and prevent it from freezing.

Use Smaller Pieces Of Compostable Materials:

Smaller pieces of materials, such as shredded leaves or chopped kitchen scraps, will break down more quickly in cold temperatures.

Keep The Compost Pile Moist:

In winter, moisture can evaporate more slowly, so it is important to monitor the moisture level of your compost pile and ensure it stays moist but not waterlogged.

Cover Your Compost Pile:

Covering your compost pile with a tarp or other covering can help to retain heat and moisture, and protect the pile from excessive snow or rain.

Use A Compost Thermometer:

A compost thermometer can help you monitor the temperature of your compost pile and ensure it stays within the ideal temperature range for decomposition.

With these adjustments, it is possible to continue composting during the winter months and produce finished compost in the spring.

Can I Compost Pet Waste?

Explanation Of Why Pet Waste Is Not Recommended For Composting

Composting pet waste is not recommended for several reasons.

  1. First, pet waste can contain harmful pathogens and bacteria, such as E. coli and salmonella, that can survive the composting process and potentially contaminate soil and crops.
  2. Second, pet waste can also contain parasites and other pathogens that can be harmful to humans and animals.

Composting Alternatives For Pet Waste

Instead of composting pet waste, consider other disposal options such as:

Bagging And Disposing Of Pet Waste In The Trash:

This is the most common and safest method of disposing of pet waste.

Flushing pet waste down the toilet:

Some pet waste can be safely flushed down the toilet, but it is important to check with your local wastewater treatment facility first to ensure that they accept pet waste in their system.

Using a pet waste disposal system:

There are several commercially available pet waste disposal systems that use enzymes or other methods to break down pet waste safely.

It is important to remember that pet waste should never be composted in a compost pile that will be used on edible plants or crops.

Is Compost Safe For Plants And Vegetables?

Explanation of the benefits of using compost on plants and vegetables

Yes, Compost Is Generally Safe And Beneficial For Plants And Vegetables. Compost is a nutrient-rich soil amendment that can improve soil structure, texture, and fertility, leading to healthier plants and higher yields.

When properly made and used, compost can also help to retain moisture in the soil, reduce erosion, and promote a healthy balance of beneficial microorganisms.

Safety Considerations When Using Compost

However, it is important to use compost safely and appropriately. Here are some safety considerations to keep in mind when using compost:

Use Only Fully Matured Compost:

Compost that is not fully matured or is still decomposing can be too high in nutrients and potentially harmful to plants.

Use Only Compost From Trusted Sources:

Compost can contain contaminants such as heavy metals, pesticides, and other chemicals if made from non-organic materials or improperly managed.

Don’t Use Compost That Smells Bad:

A bad smell can indicate that the compost is not fully matured or has not been properly managed, and may contain harmful pathogens.

Use Compost In Moderation:

While compost can be very beneficial to plants, too much of it can cause imbalances in the soil and lead to over-fertilization. As a general rule, apply no more than 1 inch of compost per year to your garden or lawn.

Avoid Using Compost On Edible Crops That Are In Contact With The Soil:

While compost is generally safe for use on edible crops, it is recommended to avoid using it on crops that grow close to the soil surface, such as strawberries, lettuce, and carrots, as they can come into contact with any potential contaminants in the compost.

By following these safety considerations, you can safely and effectively use compost to improve the health and yield of your plants and vegetables.

IV. What Is Compost Tea?

Definition Of Compost Tea

Compost tea is a liquid fertilizer that is made by steeping compost in water. It is a concentrated solution of nutrients, beneficial microorganisms, and other organic matter that can be applied directly to plant roots or foliage.

Explanation Of How To Make Compost Tea

To make compost tea, simply steep compost in water for several days, stirring or aerating the mixture periodically. The resulting liquid can then be strained and used as a fertilizer or soil amendment.

Compost Tea Offers Several Benefits For Plants, Including:

Improved Soil Health:

Compost tea can improve soil structure, nutrient content, and water-holding capacity, leading to healthier plants.

Increased Plant Growth:

The nutrients and microorganisms in compost tea can promote plant growth and development.

Disease Suppression:

Compost tea can contain beneficial microorganisms that can help to suppress plant diseases and pests.

Reduced Environmental Impact:

Compost tea is a natural, organic fertilizer that can reduce the need for synthetic fertilizers and other chemical treatments.

It is important to note that while compost tea can offer many benefits for plants, it should be made and used properly to avoid potential contamination and other issues.

For example, it is important to use only mature, high-quality compost to make compost tea and to properly clean and maintain equipment used to make and apply the tea.

Can Compost Help Reduce Landfill Waste?

Explanation Of How Composting Reduces Landfill Waste

Yes, Composting Can Help To Significantly Reduce The Amount Of Waste That Ends Up In Landfills.

When organic materials such as food scraps, yard waste, and other biodegradable materials are sent to a landfill, they decompose without oxygen, producing methane gas, a potent greenhouse gas that contributes to climate change.

Additionally, the space in landfills is limited, and the more waste that is sent to them, the sooner they will fill up and require costly expansion or the creation of new landfills.

Composting these materials instead of sending them to a landfill allows them to decompose naturally in a controlled environment, producing nutrient-rich compost that can be used to improve soil health and promote plant growth.

This not only reduces the amount of waste sent to landfills but also helps to conserve resources and reduce greenhouse gas emissions.

Tips For Reducing Waste Through Composting

Here are some tips for reducing waste through composting:

Start Small:

If you’re new to composting, start with a small bin or pile and gradually increase the amount of material you add as you become more comfortable with the process.

Separate Compostable Materials:

Set aside a separate container for compostable materials such as food scraps, yard waste, and paper products, and keep it in a convenient location in your kitchen or yard.

Use The Right Materials:

Not all materials can be composted, so it’s important to use only compostable materials such as fruit and vegetable scraps, yard waste, and paper products that are free of chemicals and non-compostable items such as plastic, glass, and metal.

Monitor Moisture And Temperature:

Composting requires a balance of moisture and temperature, so it’s important to monitor these factors and adjust as needed to keep the compost from becoming too dry or too wet or too hot or too cold.

Use The Finished Compost:

Once the compost is fully decomposed, use it to enrich soil, fertilize plants, or top-dress lawns.
By incorporating composting into your routine and making it a regular part of your waste management practices, you can help to reduce landfill waste and contribute to a healthier, more sustainable environment.

Are There Any Composting Resources Available?

Overview Of Composting Resources

Yes, there are many resources available to help people learn about and practice composting.

List Of Useful Websites And Organizations

Here are a few examples:

Cooperative Extension Offices:

Cooperative Extension Offices offer information on composting and other gardening and agricultural topics.

Environmental Organizations:

Organizations such as the

  • Environmental Protection Agency (EPA),
  • the Natural Resources Defense Council (NRDC), and
  • the Sierra Club offer information

on composting and other environmental issues.

Composting Websites:

Website Name Description
Compost Guide Provides information on composting techniques and troubleshooting tips, as well as using compost in gardening and farming
GrowVeg Offers tips and advice on using compost in vegetable gardening, including how to incorporate it into soil, using it as a top dressing, and composting techniques
Planet Natural Provides information on composting, including how to make it, using it in gardening, and composting troubleshooting
The Spruce Offers articles on composting and how to use it in gardening, as well as guides on how to start a compost pile, vermicomposting, and more
Gardeners’ World Provides tips and advice on using compost in gardening, including how to make it, using it as a soil conditioner, and composting for specific plants
Green Action Centre Offers tips and advice on using compost for sustainable gardening practices, including reducing waste, improving soil quality, and conserving water
The Old Farmer’s Almanac Provides articles on composting, including how to use it in gardening, compost tea recipes, and more
Epic Gardening Offers articles and videos on using compost in gardening, including how to incorporate it into soil, using it as a top dressing, and composting techniques
DIY Network Provides a step-by-step guide on using compost in gardening, including how to make it, using it as a fertilizer, and composting for specific plants
Eartheasy Offers information on using compost for sustainable living, including composting techniques, compost tea recipes, and more


Composting Associations And Organizations:

There are also several organizations dedicated to promoting composting, including the

  • US Composting Council,
  • the Composting Association of Vermont,
  • and the Master Composter Association.

These resources can be a valuable source of information and support for those interested in composting.

Whether you’re just starting out or looking to improve your composting skills, there are plenty of resources available to help you get started and succeed.


In this FAQ, we covered the basics of composting, including what compost is and how it’s made, the benefits of composting, what can and cannot be composted, tips for successful composting, and how to use compost.

We also discussed compost tea, composting in winter, composting pet waste, and composting resources.

Composting is an important practice that can help reduce waste, improve soil health, and benefit the environment.

By diverting organic waste from landfills and turning it into nutrient-rich compost, we can create healthier soils and grow healthier plants.

Composting is a simple and effective way to make a positive impact on the planet, and we encourage everyone to give it a try!

Similar Posts