What Is Good for Using As A Compost Activator?





As an affiliate, we may earn a commission from qualifying purchases. We get commissions for purchases made through links on this website from Amazon and other third parties.


Has your compost not been breaking down as it should? More than likely, you need to activate the microorganisms within the compost so that decomposition can start taking place. However, you are probably wondering, what is good for using as a compost activator?

Substances with high nitrogen levels are good for using as a compost activator. Why Do You Need Compost Activators?

Compost activators, also known as compost accelerators, help to speed up the decomposition process. The microorganisms within your compost require nitrogen to build proteins. Without it, they are unable to reproduce. 

You can choose to add either natural or commercial activators to boost the nitrogen levels within the compost. By doing so, you boost the number of microorganisms decomposing the compost. Thus, increasing the rate of decomposition. 

Natrual compost activators

Coffee grounds

Coffee grounds are rich in nitrogen and prevalent in most households. Instead of throwing them out, consider adding them to your pile. 

Some people even suggest mixing the grounds with lime for the best results. 

Green Plants

Certain green plants you may find in your garden or kitchen that are high in nitrogen may also act as great compost activators. 

Some plants that are nitrogen-rich include:

  • Alfalfa
  • Beans
  • Clover
  • Comfrey 
  • Grass clippings
  • Nettles
  • Peas
  • Seaweed

Adding a few of these plants throughout your pile can significantly boost nitrogen levels.

Human urine

Surprisingly, human urine is often recommended as a compost accelerant. Urine is nitrogen-rich and mostly comprised of water.

Therefore it can easily travel throughout the compost to make the nitrogen more easily available to the microbes that need it. 

Also, the microbes are already surrounded by plenty of water and are therefore less likely to take more in during moist conditions.


It is no surprise that manure makes a great compost accelerator since it is what we most commonly think of when we think of natural fertilizers. Manure is very nitrogen-rich, and readily available if you have farm animals. 

Common animals to use manure from are:

  • Alpacas
  • Chickens
  • Cows
  • Horses
  • Pigs
  • Rabbits

Horse manure may not be the best choice due to possible pesticides and undigested seeds within it. 

How To Make your own Compost Activator

If you want to make your own special blend of compost activator, there are different ways to go about it. You could simply add finished compost to the pile to introduce new microbes, or you can blend together a few different ingredients as the commercial accelerants do. 

Beer and Cola Recipe

This recipe requires:

  • A gallon of warm water
  • One can of flat, warm beer (avoid light beers)
  • One can of cola (make sure it is NOT sugar-free)
  • A half-cup of household ammonia

Pour the water into a 5-gallon bucket and then add in the other ingredients. Fully blend the solution and then pour it over your compost pile.

Mix it into the pile using a shovel or rake. For best results, add a few scoops of garden soil as well. 

Beer contains yeast which encourages the growth of the microbes.

The cola contains sugar which provides needed carbon to the microbes, while the ammonia contains high levels of nitrogen. 

Dry Yeast and Molasses Recipe

This recipe requires:

  • 2 shovel fulls of garden soil
  • One packet of dry yeast
  • ¼ cup of molasses 
  • Warm water

Place the soil, yeast, and molasses within a 5-gallon bucket. Then fill the bucket with warm water until the mixture is about 3 inches from the top.

Fully blend the mixture and then set it in the sun. Continue to mix the mixture every couple of hours for about 48 hours. 

After it has fully been mixed for 48 hours, pour the mixture over your compost pile and consider stirring it in with a shovel or rake. 

The molasses contains a lot of different nutrients, sugar, and carbon which help the microbes thrive. 

Nitrogen Rich Substances Make Good Compost Accelerators

If your compost isn’t breaking down at the rate it should, it’s likely time to introduce an activator to it. Compost performs its best when there is a 30:1 carbon to nitrogen ratio.

Therefore, a nitrogen-rich activator is likely the necessary ingredient your compost needs to thrive when this ratio is off. 

You can use naturally occurring substances from around your house and yard, purchase a commercially made activator, or create your own mixture.


Related Posts

About the author

Latest Posts

  • Junk Food Compost: Turning Unhealthy Eating into Sustainable Fertilizer

    Junk Food Compost: Turning Unhealthy Eating into Sustainable Fertilizer

    Composting is a sustainable practice that transforms organic materials into a valuable fertilizer, benefiting both the environment and agriculture. This process involves the decomposition of brown matter, such as twigs and paper, green matter, like food scraps and grass, and the addition of water. By diverting waste from landfills and reducing the greenhouse gas emissions…

    Read more

  • Composting Bay Leaves: A Clear Guide to Effective Recycling

    Composting Bay Leaves: A Clear Guide to Effective Recycling

    Composting bay leaves can be an excellent addition to any home gardeners’ composting routine. Bay leaves, like other thick and leathery foliage, can provide essential nutrients to your compost pile and ultimately benefit your garden. However, it’s important to understand the specific characteristics of bay leaves and the proper methods for incorporating them into your…

    Read more

  • Will Compost Kill Grass? The Truth About Using Compost as a Lawn Fertilizer

    Will Compost Kill Grass? The Truth About Using Compost as a Lawn Fertilizer

    As a lawn care enthusiast, I have often heard the question, “will compost kill grass?” The answer is not straightforward, as it depends on several factors. Composting is an excellent way to improve the health of your lawn, but it can also damage it if not done correctly. Understanding compost is crucial to answering the…

    Read more

error: Content is protected !!