How To Mix Cocopeat With Vermicompost

Cocopeat and vermicompost are both popular options for supplementing your soil. These dried coconut husks and redworm castings provide nutrients, aeration, and increased water retention that help your plants thrive. As they say, two substrates are better than one!

You can mix cocopeat and vermicompost on their own or in conjunction with soil and other growing mediums. Combining these substrates has many benefits for plants, including access to essential nutrients, a balanced pH, and preventing weeds and fungi.

This article will discuss combining cocopeat and vermicompost and the benefits of using the two substrates together.

Can You Use Vermicompost and Cocopeat Together?

You can use vermicompost and cocopeat together to create an ideal environment for your plants. However, neither of these substrates should be used in isolation, as they are most effective when combined.

Vermicompost, rich in nutrients, requires careful blending to avoid nutrient toxicity. Using it alone risks overwhelming plants with excessive nutrients, potentially leading to diseases and plant death.

Similarly, while cocopeat is excellent for aeration and water retention, it lacks sufficient nutrients and root support when used alone. Therefore, it’s best to mix it with other soil components.

How to Use Vermicompost and Cocopeat Together

You can use vermicompost and cocopeat together in combination with soil or by themselves. When used with soil, you can use a 1:1:1 ratio to blend the three. When using only vermicompost and cocopeat, cocopeat should make up the majority of the mixture.

With Soil

To use vermicompost and cocopeat combined with soil, you combine them with soil in a 1:1:1 ratio.

If the nutrient content in your soil is high, you may need to decrease the amount of vermicompost in the mixture to avoid nutrient toxicity. To address this issue, you can increase the amount of cocopeat in the mixture so that the combined proportion of vermicompost and cocopeat still constitutes two-thirds of the substrate.

Adding soil to your potting mixture helps stabilize the roots, which is beneficial for taller plants. It can also save money if you source it from your ground.

On Their Own

When opting for a vermicompost and cocopeat blend without soil, cocopeat should dominate the mixture, constituting at least 70% (and 30% vermicompost) to prevent nutrient toxicity. This ratio can be adjusted based on your plants’ specific nutrient requirements.

If you discover that your plants need more nutrients, you can increase the vermicompost to 40% of the mixture. A scientific study published in Bioresearch Technology found that exceeding 40% of vermicompost in your mix does not increase the benefit to your plants.

Plants Unsuitable for Vermicompost and Cocopeat Mixtures

There are a few plants you shouldn’t use this mixture with, including:

Desert Plants and Succulents

There are a few exceptions to the standard mixture ratios. Any plants that need soil with good drainage, such as succulents and other desert plants, need to use much less casting and cocopeat mixture.

Vermicompost and cocopeat both retain a lot of water, which is often suitable for plants in hot climates. However, desert plants are accustomed to dry soil and quickly develop root rot if the water sits against their roots for extended periods.

If you choose to use a vermicompost and cocopeat mixture, it should be used very sparingly and not on its own. 

When used for desert plants and succulents, the vermicompost and cocopeat mixture should not make up more than 10% of the soil mix. Using river sand in the combination will also provide additional drainage to offset the water retention in the plants.

Food Plants

If the vermicompost contains animal waste, you cannot use the mix to fertilize plants that produce food.

The bacteria in animal waste are dangerous, and you should never ingest plant matter that has been in contact with the substance. Using vermicompost from animal waste to fertilize food plants can lead to salmonella, norovirus, and more. 

You can use cocopeat for these plants, but it must be mixed with soil and not comprise more than 70% of the mix.

Benefits of Combining Vermicompost and Cocopeat

Combining vermicompost and cocopeat, benefits include a balanced pH, water retention, and prevention of weeds and fungus. Both vermicompost and cocopeat contribute several unique properties to the mix that complement each other and enhance plant health.

These benefits include: 

Enhanced Aeration

Traditional soil is very compact and does not allow air to penetrate below the surface, depriving the roots of oxygen. Due to their light texture, vermicompost and cocopeat allow oxygen to travel freely throughout the substrate. 

Effective Water Retention

Vermicompost and cocopeat both have incredible water retention, and cocopeat alone can hold eight times its weight in water. This characteristic reduces the frequency plants need to be watered and helps them handle heat better. Water retention is a huge benefit for plants in hot climates or during summer when soil tends to dry out very quickly. 

Balanced pH

Vermicompost has a pH of 7, which is neutral, while cocopeat has a slightly lower and more acidic pH. The two substrates combined maintain a primarily neutral pH suitable for most plants. 


Both vermicompost and cocopeat are organic. Unlike other soil enhancers, they will keep chemicals out of your garden and away from sensitive plants. It is also healthier for the ground and our planet.

Seed Starter Friendly

Vermicompost and cocopeat are excellent choices for seed starters because they are very lightweight. This lack of density allows the seeds to open and establish roots without meeting resistance from dense or hard soil.

Long-Lasting and Decomposition

Vermicompost and cocopeat both decompose very slowly. Vermicompost can last three years before it begins to lose nutrients, and because cocopeat does not have many nutrients, the only concern is its shape, which it can retain for years.

Vermicompost and cocopeat each bring unique advantages that supplement what the other lacks. This unique combination of benefits demonstrates why using both materials together is even more effective than separately.

Benefits of Vermicompost 

Some of the benefits of vermicompost include:

Well-Rounded Nutrients

While cocopeat has a few nutrients, it cannot fulfill all of your plants’ needs. Vermicompost compensates for this by providing all of the nutrients necessary for plant success at a high density.

The density of nutrients in vermicompost offsets the lack of nutrients in cocopeat, making the combination able to fulfill all plants’ needs.

Plant Stability

For plants to grow without falling over, they need a substrate that can hold their bases steady, and vermicompost provides this structure. Although it does have good aeration, it is still compact enough to support plants. Cocopeat pellets, on the other hand, are not dense enough to keep plants upright.

Salinity Mitigation

Cocopeat contains salt, which can be harmful to plants. However, vermicompost contains humic acid, an organic compound that helps counteract salt and protects plants from harm. Thus the two substances work to balance each other out perfectly.

Benefits of Cocopeat

Some of the benefits of cocopeat include:

Repels Weeds

Cocopeat helps keep weeds away and makes it difficult for them to establish roots. Repelling weeds is something that vermicompost and soil cannot do, so this ability makes cocopeat a valuable addition to any substrate mixture.

Prevents Fungus

The chemical properties of cocopeat help keep fungus from establishing a presence in the soil. This unique characteristic is beneficial, as vermicompost naturally contains bacteria and can not fight off the fungus.

Final Thoughts

Using vermicompost and cocopeat together can benefit your garden or plants. Together, they can provide nutrients, roots stability, and a balanced pH while presenting weeds and fungus.

When you mix cocopeat with vermicompost, do not exceed 40% vermicompost, although 30% is the ideal ratio. With soil, use a 1:1:1 balance unless the soil you are using has an extraordinary amount of nutrients.

Dr. Moritz Picot

Dr. Moritz Picot is a horticulture enthusiast and the founder of, where he serves as the lead content writer. He established the website in 2022 as a valuable resource for both gardening aficionados and beginners, compiling all the gardening tips he has accumulated over the past 25 years. Alex has a passion for nurturing plants, transforming backyards into inviting spaces, and sharing his knowledge with the world.

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