Compost Accelerator: How to Speed Up Composting

  • By: Sam Richards
  • Date: July 3, 2022
  • Time to read: 6 min.

What is a compost accelerator? What is a good compost starter? If you are asking yourself these questions, you have come to the right place! In this blog post, we will discuss what a compost accelerator is and how to speed up the composting process. We will also provide tips on making your own compost accelerator and advice on where to buy one. Let’s get started!

What is a Compost Accelerator?

A compost accelerator is a material that you add to your compost pile to help speed up the decomposition process. There are many different types of accelerators available on the market, but you can also make your own.

Accelerators work by providing the bacteria and other organisms that break down organic matter with the ideal conditions for growth. This includes things like oxygen, moisture, and nutrients. By adding an accelerator to your compost pile, you can significantly shorten the amount of time it takes for your compost to break down.

How Compost Accelerators Work

Compost starters are a key ingredient in making sure your compost pile is healthy and productive. Essentially, starter cultures are designed to jumpstart the decomposition process by introducing beneficial bacteria and fungi to the mix. These organisms help break down organic matter, leading to rich, nutrient-rich compost that your plants will love. While you can add manure or other sources of these organisms to your compost pile, using a starter culture can help ensure that your compost is teeming with beneficial microbes. There are a few different ways to use compost starters: either as a dry powder that you mix into the pile or as a liquid that you spray on top. Either way, they can help give your compost a boost, leading to better results in the end.

Benefits of Using Compost Starter

There are several benefits to using a compost accelerator. One of the most obvious is that it can help you speed up the composting process. This is especially beneficial if you need compost for your garden and don’t have the time to wait around for it to break down naturally.

Another benefit of using an accelerator is that it can improve the quality of your compost. This is because accelerators help to encourage bacterial growth, which results in more complete decomposition. This means that there will be fewer large pieces of organic matter remaining in your final product.

Finally, using an accelerator can also help to reduce bad odors from your compost pile. This is because bacteria consume odor-causing compounds as they break down organic matter.

Tips for Using a Compost Accelerator

There are a few things you can do to ensure that your compost accelerator is effective.

  1. First, make sure to mix it thoroughly into your compost pile. This will help to distribute the bacteria evenly and ensure that they have plenty of organic matter to eat.
  2. Second, keep your compost pile moist. Bacteria need moisture in order to survive and break down organic matter. If your pile is too dry, the bacteria will die and your compost will not be accelerated.
  3. Finally, keep an eye on your compost pile and make sure that it is not heating up too much. If the temperature gets too high, the bacteria will die and your composting process will come to a halt.

Who Needs Compost Accelerators

Although anyone can benefit from adding a compost accelerator to their compost pile, there are certain groups of people who will see the biggest benefit. Gardeners, for example, can use compost to improve the quality of their soil, and accelerators can help to speed up the process. Those who have limited space for gardening can also make use of accelerators to create nutrient-rich soil without having to maintain a large compost pile.

In addition, those who live in areas with a lot of rainfall or snow may find that accelerators help to keep their compost from becoming waterlogged and ineffective. Ultimately, whether or not you need a compost accelerator is up to you, but those with specific gardening needs or limited space may find them to be invaluable tools.

Buy or Make It Yourself

If you’ve decided that you could benefit from using a compost accelerator, you may be wondering whether it’s better to buy one or make your own. There are pros and cons to both approaches.

On the one hand, buying an accelerator can be more expensive than making your own. However, it can also be more convenient, as you won’t have to gather the ingredients yourself. Additionally, store-bought accelerators are often made with specific composting needs in mind, so you’re more likely to find one that’s ideal for your purposes.

Making your own accelerator, on the other hand, is usually cheaper than buying one. It also allows you to customize the recipe to suit your specific needs. However, it can be more time-consuming to gather the ingredients and mix them together. You can read our detailed instructions on how to make a compost accelerator.

Compost Accelerators: What to Consider Before You Buy One

When you’re considering buying a compost accelerator, there are a few things you should keep in mind.


First, consider what ingredients the accelerator contains. Some accelerators contain chemicals that some gardeners prefer to avoid. Others may be made from natural ingredients that will break down quickly in the compost pile.

Nitrogen Compounds

One important factor in composting is the ratio of carbon to nitrogen, or C:N. Carbon-rich materials, like dead leaves and twigs, are low in nitrogen. Nitrogen-rich materials, like grass clippings and vegetable scraps, are high in nitrogen. A good compost pile needs more carbon than nitrogen for proper decomposition to occur.

A compost accelerator can help you achieve the correct C:N ratio by adding extra nitrogen to your compost pile. This is especially helpful if your compost pile is mostly made up of carbon-rich materials. By adding an accelerator, you can speed up the decomposition process and create nutrient-rich compost more quickly.

Organic Formulas

There are many commercial compost starters and accelerators available for purchase. These products usually contain a blend of organic materials, like manure, that help to jumpstart the composting process. If you choose to use a commercial product, be sure to read the labels carefully. Some products may contain chemicals or other ingredients that you do not want in your compost.


To find a compost starter or accelerator that’s right for you, it may be helpful to read online reviews. Look for products that have been reviewed favorably by other gardeners or composters. You can also ask friends or family members for recommendations. Once you’ve found a product you’re interested in, be sure to follow the instructions on the label carefully.


Think about how much money you’re willing to spend on an accelerator. Store-bought accelerators can be more expensive than making your own, but they can also be more convenient. Additionally, store-bought accelerators are often made with specific composting needs in mind, so you’re more likely to find one that’s ideal for your purposes.

Final Thoughts

Remember, there’s no single “right” way to compost. If you’re not happy with the results you’re getting, don’t be afraid to experiment with different methods and ingredients. With a little trial and error, you should be able to find a composting system that works well for you.

Have you ever used a compost accelerator? What was your experience? Let us know in the comments below!

FAQs About Compost Accelerators

What are the ingredients in the compost accelerator?

Compost accelerators typically contain a combination of carbon-rich and nitrogen-rich materials. The carbon-rich materials help balance out the green materials (nitrogen-rich) and create a more ideal environment for decomposition.

How do you make compost accelerator spray?

You can make your own compost accelerator spray by mixing together water, molasses, and kelp meal. This recipe will give you a nitrogen-rich compost starter. To use, simply mist the green materials in your compost pile with the spray. The molasses will act as a food source for the microbes and the kelp meal will provide essential nutrients.

Does lime speed up composting?

Lime can also be used as a compost accelerator. The high calcium content in lime helps to neutralize the acids that are produced during decomposition. This creates an environment that is more conducive to microbial activity. To use, simply add a handful of lime to your compost pile every time you add new materials. You can also add lime when you turn your pile.

  1. I use the nettie juice very successfully nettles grow on my Allotment so I don’t have far too go chuck it in a small waste bin for a few days then tip it into the Compost Tubs just water it down and leave it to work for you

Leave a Reply

Your email address will not be published.