Composting Horse Manure: The Proven Benefits for Your Garden

by | Jun 2, 2023 | Blog

Composting, an age-old practice utilized by farmers and gardeners worldwide, is nature’s process of recycling decomposed organic material into a rich soil known as compost. This natural fertilizer is prized for its ability to enrich soil health, promote plant growth, and reduce the need for chemical fertilizers. But when one thinks about composting, kitchen scraps or garden waste usually spring to mind. Yet, there’s another underutilized resource that’s often overlooked – horse manure.

Horse manure composting is a powerful way to transform what is often viewed as waste into a valuable asset. Anyone who has horses knows the sheer amount of manure they can produce. If you’re one of those, or if you have access to horse manure, you’re sitting on a veritable gold mine of gardening goodness.

In this article, we’re going to delve into the art of composting horse manure, discussing its process, safety considerations, and the significant benefits it can bring to your garden. Whether you’re a seasoned gardener looking to enrich your soil or a horse owner trying to manage manure sustainably, this guide offers insights that can help you enhance your gardening practice and contribute to a more sustainable environment.

What Is Horse Manure Composting

Horse manure composting is a process that involves the microbial decomposition of horse manure under controlled conditions to produce a rich, organic soil amendment. The final product, horse manure compost, is a dark, crumbly substance that closely resembles fertile garden soil and is packed full of nutrients that plants love.

The composting process involves stacking horse manure, often mixed with bedding material such as straw or wood shavings, in piles or compost bins. These piles are regularly turned or aerated to aid decomposition and ensure uniform composting. Over time, the organic matter in the pile breaks down, thanks to the work of billions of microscopic organisms that generate heat as they digest the material. This heat can kill weed seeds and pathogens, resulting in a sanitary, safe product that can be used directly on garden soils.

The practice of composting horse manure offers a solution to a significant issue in equestrian environments: waste disposal. A single horse can produce between 30 and 50 pounds of manure per day. That’s nine tons or more per year for just one horse! This amount can quickly become a management issue, especially on large equestrian properties with multiple horses. By composting horse manure, we can turn this “problem” into a profitable resource, one that improves soil health, promotes plant growth, and contributes to sustainable farming and gardening practices.

Apart from these benefits, composting horse manure also has broader environmental implications. It reduces the need for chemical fertilizers, often associated with nutrient run-off and water pollution. Plus, by composting, we participate in a natural recycling process, reducing waste sent to landfill and decreasing the production of methane, a potent greenhouse gas.

In the following sections, we’ll take a closer look at how to compost horse manure effectively and the specific benefits this practice can bring to your garden.

How to Compost Horse Manure

Composting horse manure is a relatively straightforward process, but it does require some attention and care. Let’s break it down into four main steps:

1. Collection and Storage of Horse Manure:

The first step in composting horse manure is collection and storage. Ideally, the manure should be collected daily from stalls and paddocks and piled in a designated area. If possible, it’s best to mix the manure with bedding materials like straw, wood shavings, or other similar stuff. This mixture aids in balancing the carbon to nitrogen ratio, crucial for efficient composting. A good manure fork like the “Little Giant DuraFork” can be handy for this purpose. When storing the manure, consider a compost bin or tumbler such as this Outdoor Tumbling Composter to keep the process tidy and hasten the composting process (note that you will only be able to store a relatively small amount of the manure in this composter, but it does act as a handy storage for a small amount of ready to go compost).

2. Turning and Maintaining the Pile:

Turning the pile is critical as it introduces oxygen, essential for the microbes at work in your compost. A compost aerator tool is helpful to simplify this job. Also, it would help if you kept the pile as moist as a wrung-out sponge. If it gets too dry, you can sprinkle it with water. A good quality hose like the “Flexzilla Garden Hose” can be perfect for this job.

3. Process Duration:

Composting horse manure can take anywhere from two months to a year, depending on various factors such as pile size, ambient temperature, and how often the pile is turned. You’ll know it’s ready when it has a uniform, crumbly appearance, a pleasant earthy smell, and is cool to the touch. A compost thermometer like the “REOTEMP Backyard Compost Thermometer” can help track the temperature and thereby the progress of your pile.

4. Safety Measures:

Before using the compost, it’s essential to ensure it’s fully decomposed and safe for use. Incomplete or improperly composted manure can contain pathogens or weed seeds. That’s why you must pay close attention to the texture & smell of the compost. Again, it should smell earthy and be very crumbly.

For a visual guide to these steps, you might find this instructional video helpful:

Once you have your compost ready, it’s time to reap the benefits in your garden.

Proven Benefits of Horse Manure Compost for Your Garden

Composting horse manure not only addresses the challenge of waste disposal, but it also provides a rich, organic material with numerous benefits for your garden. Let’s delve into these:

1. Nutrient Content:

Horse manure compost is a rich source of essential nutrients that plants need to thrive. It offers a natural and slow-release form of nitrogen, phosphorus, and potassium, the three primary nutrients required by plants. In addition, compost can supplement a range of secondary and micronutrients that plants need in smaller quantities. To accurately measure your compost nutrient levels, you could use a soil testing kit like the “MySoil – Soil Test Kit“.

2. Soil Structure:

One of the most significant benefits of compost is its ability to improve soil structure. Adding horse manure compost to your garden can enhance soil texture, boost its water-holding capacity, and promote aeration, all of which can stimulate healthy plant root development. A soil aerator, like the “Lotech Products Compost Crank Compost Aerator” can further assist in improving soil aeration when applying compost.

3. Environmental Benefits:

As mentioned earlier, composting horse manure reduces the need for chemical fertilizers, which can leach into water systems and cause pollution. Furthermore, it contributes to the sequestration of carbon in the soil, helping to mitigate climate change. To further support your green efforts, you could use eco-friendly gardening tools like those in the “UKOKE Garden Tool Set.”

4. Cost-Effectiveness:

Making your own compost from horse manure can save you significant money compared to buying commercial fertilizers. And the benefits of a healthier and more productive garden can also lead to savings in terms of grocery bills. Again, using a compost bin like the Outdoor Tumbling Composter can help manage your compost pile cost-effectively.

5. Studies/Examples:

Scientific research, like the study published in the “Journal of Plant Nutrition and Soil Science,” has demonstrated the positive effects of horse manure compost on plant growth and soil health. If you want to learn more about this topic, a book like “The Rodale Book of Composting” offers a comprehensive guide to composting with many practical tips.


Composting horse manure is much more than an environmentally-friendly way to dispose of waste. It’s an age-old practice that enriches our gardens, supports healthy plant growth, and contributes to the health of our planet. With the simple steps outlined in this article, anyone can start their compost pile and create a rich, nutrient-packed supplement for their garden. The tools recommended throughout this article, like the “Little Giant DuraFork,” the Outdoor Tumbling Composter or the”Lotech Products Compost Crank Compost Aerator” among others, can streamline your composting process and help ensure its success.

Not only is horse manure composting a cost-effective alternative to commercial fertilizers, but it also offers unique benefits like improving soil structure and increasing its water retention capacity. When you add to this the vital role composting plays in reducing landfill waste and combating climate change, it becomes clear that composting horse manure is a win-win solution for gardeners and the environment.

As we increasingly look for ways to live more sustainably and harmoniously with nature, practices like composting horse manure become not just an option but a necessity. We encourage you to embrace this golden opportunity, create your compost pile, and witness the transformation in your garden. After all, in the words of renowned naturalist Sir David Attenborough, “The natural world is the greatest source of excitement; the greatest source of visual beauty; the greatest source of intellectual interest. It is the greatest source of so much in life that makes life worth living.”

About The Author

<a href="" target="_self">Equiniction Team</a>

Equiniction Team

We are a group of passionate riders, trainers, and horse owners who are dedicated to sharing our love and knowledge of all things equine. Whether you are a seasoned pro or just starting out on your equestrian journey, we have something for everyone. From training and care tips to the latest in equine news and events, we are your one-stop resource for all things horse-related. So come along for the ride and join our community of horse lovers today!

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