Compost Tea for Cannabis Plants: A Comprehensive Guide

Growing cannabis can be both a rewarding and challenging experience, especially for those who are new to the craft. One of the most crucial parts of cultivating healthy and flourishing plants is providing them with the nutrients they need to thrive. Compost tea is an organic and nutrient-rich solution that can enhance soil conditions and help cannabis plants grow. But what exactly is compost tea, and how can you use it to your advantage? In this article, we will explore the benefits of compost tea, the different types available, the necessary materials, and a step-by-step guide on how to make and apply it to your cannabis plants. By the end of this article, you will have a better understanding of compost tea and how it can help you achieve a more abundant and successful cannabis yield.

What is Compost Tea?


What Is Compost Tea?
For those looking for a natural and organic way to enhance the growth of their cannabis plants, compost tea may be the solution you’ve been searching for. Compost tea is an all-natural fertilizer that is made by steeping compost in water, essentially creating a nutrient-rich brew that can be easily absorbed by your plants. But what exactly is compost tea, how does it benefit cannabis plants, and how can you make it yourself? Let’s dive in and explore the world of compost tea.

Benefits of Compost Tea for Cannabis Plants

Compost tea is an organic brew that provides various benefits for cannabis plants. Here are some of the primary benefits of using compost tea for your cannabis plants:

  • Improves soil structure: Compost tea helps improve soil structure, making it more porous and allowing for better water drainage and aeration. This can lead to healthier root growth and overall plant health.
  • Enhances nutrient availability: Compost tea is rich in nutrients like nitrogen, phosphorus, and potassium, as well as micronutrients like iron, manganese, and zinc. These nutrients are essential for plant growth and development and are made more available to the plant through the use of compost tea.
  • Reduces plant stress: Compost tea can help reduce plant stress from factors like extreme temperatures or drought, as it improves the plant’s ability to take up water and nutrients.
  • Increases disease and pest resistance: The beneficial microbes in compost tea help create a stronger, more resilient plant that is better equipped to resist pests and diseases.
  • Improves flavor and aroma: Compost tea can improve the flavor and aroma of your cannabis plants by promoting healthy growth and development.
  • Supports biodiversity: Compost tea helps promote a diverse soil ecosystem by introducing a wide variety of beneficial microorganisms into the soil.

Using compost tea can be an excellent way to improve the health and vitality of your cannabis plants, leading to better growth, increased yield, and improved quality.

Types of Compost Tea

Compost tea comes in several different types, each with their own unique composition and benefits. Here are some of the most common types of compost tea:

  • Vermicompost Tea: Made using worm castings, this tea is rich in microorganisms and essential nutrients that help promote healthy plant growth.
  • Manure Tea: This tea is made using animal manure, which helps fertilize soil and boost plant growth. However, it is important to use this tea with caution as it can carry harmful bacteria if not properly composted.
  • Green Tea: This type of tea is made using fresh green plant matter, such as grass clippings or young weeds. It is high in nitrogen and makes an excellent foliar spray.
  • Comfrey Tea: Comfrey leaves are high in potassium and make an excellent tea for flowering plants. However, it is important to note that comfrey is a very prolific plant and can quickly become invasive if not controlled.
  • Herbal Tea: Made using a combination of herbs, this tea is high in essential oils and can help repel pests and diseases. It also makes an excellent foliar spray for overall plant health.

When choosing the right compost tea for your cannabis plants, it is important to consider your soil type, plant stage, and overall nutrition requirements. Some teas may be more suitable for certain types of soil or plants, while others may be better suited for specific growth stages. It is also important to carefully follow brewing and application instructions to ensure optimal plant health and growth.

What You Need to Make Compost Tea

To make compost tea, you will need several key ingredients and tools. Here is a list of what you need to make compost tea:

  • Compost: The most important ingredient in compost tea is, of course, compost itself. You can use any type of compost, but it is recommended to use high-quality compost that is well-aerated and has a variety of organic matter. Make sure to avoid compost that is too wet or dry, as this can negatively affect the quality of the tea.
  • Water: You will need clean, non-chlorinated water to make compost tea. Chlorine can kill off the beneficial microbes in the tea, so it is important to use water that is free of this chemical.
  • Air: Compost tea needs to be aerated to promote the growth of beneficial microbes. To do this, you will need an air pump and an aeration stone or other device to add air to the water.
  • A Container: You will need a container to brew the compost tea. This container should be large enough to hold the compost and water, but also have enough room for the air pump and other equipment. Many gardeners prefer to use a five-gallon bucket or similar sized container.
  • Molasses: While not strictly necessary, many gardeners like to add molasses to their compost tea. Molasses is a source of sugar that can help feed the beneficial microbes in the tea and promote their growth.
  • A Strainer: Once the tea is brewed, you will need a strainer to remove any large bits of compost and prevent them from being applied to your cannabis plants.

By having these essential elements, you can start brewing your own compost tea at home and reap the benefits it has to offer for your cannabis plants.

How to Make Compost Tea

To make compost tea for your cannabis plants, you’ll need a few supplies and ingredients. Here’s a step-by-step guide on how to make compost tea:

  1. Collect Compost: The first step is to collect compost, which can be homemade compost or store-bought compost. Make sure it’s high-quality compost that’s rich in organic matter and beneficial microorganisms.
  2. Fill Container: Fill a container – such as a bucket or barrel – with water. You can use tap water or rainwater. If you’re using tap water, let it sit for a few hours to allow the chlorine to evaporate.
  3. Add Compost: Place the compost in a mesh bag or a cheesecloth and tie it closed. Then, immerse the bag of compost in the water, making sure it’s fully submerged.
  4. Aerate the Mixture: Aerate the mixture using an air pump and air stone. This will help to oxygenate the water and encourage the growth of beneficial aerobic microorganisms. You can also use a long stick to stir the mixture vigorously.
  5. Steep: Allow the mixture to steep for 1-3 days. The longer it steeps, the stronger the compost tea will be. Make sure to keep an eye on the temperature of the mixture, as it shouldn’t get too hot or too cold.
  6. Strain: After 1-3 days, remove the mesh bag or cheesecloth containing the compost from the water. You can then strain the compost tea to remove any solid particles.
  7. Store: Store the compost tea in a container with a lid, and keep it in a cool, dark place. It’s important to use the compost tea within a few days to prevent the growth of harmful bacteria.

By following these steps, you can make your own compost tea and give your cannabis plants a boost of beneficial nutrients and microorganisms.

Using Compost Tea for Your Cannabis Plants

Using Compost Tea For Your Cannabis Plants
Now that you have made your own batch of compost tea, you may be wondering how to use it for your cannabis plants. Fortunately, using compost tea is a simple and effective way to provide necessary nutrients to your plants while also promoting healthy soil. In this section, we will delve into the best methods for applying compost tea and how to incorporate it into your cannabis growing routine. So, let’s explore the different ways to use compost tea for your cannabis plants.

When to Apply Compost Tea

Compost tea can be applied to cannabis plants at various stages of growth. It is important to apply the compost tea at the appropriate time to maximize its benefits. Here are some guidelines for when to apply compost tea to your cannabis plants:

  • Vegetative stage: During the vegetative stage, cannabis plants are focused on growing strong roots, stems, and leaves. Compost tea can help support this growth by providing nutrients and beneficial microorganisms. Apply compost tea every 1-2 weeks during the vegetative stage.
  • Flowering stage: During the flowering stage, cannabis plants are focused on producing buds. Compost tea can help support this process by providing the necessary nutrients and microorganisms. Apply compost tea every 1-2 weeks during the flowering stage.
  • Transplanting: When transplanting cannabis plants, it can be helpful to apply compost tea to the new soil. This will help the plant acclimate to the new environment and establish healthy roots. Apply compost tea immediately after transplanting.
  • Stressed plants: If your cannabis plants are showing signs of stress, such as yellowing leaves or slow growth, compost tea can help revive them. Apply compost tea once a week until the plant shows signs of recovery.

Remember, compost tea should not be used as a replacement for proper soil management practices. It should be used in addition to proper watering, fertilization, and soil testing. By applying compost tea at the appropriate times, you can help your cannabis plants grow strong and healthy.

How to Apply Compost Tea

The application of compost tea is a crucial step in ensuring that your cannabis plants get the maximum benefits from it. Here are some simple steps to guide you on how to apply compost tea:

Step 1: Water your cannabis plants before application to prevent the roots from soaking up a concentrated solution.

Step 2: Pour the compost tea mixture into a sprayer or watering can for easy application.

Step 3: Apply the compost tea directly to the soil around the base of the plant. Avoid applying the tea on the foliage as this can lead to mold growth and unwanted pathogens.

Step 4: Ensure that the compost tea reaches the root zone by applying it slowly and evenly.

Step 5: After application, cover the soil with a layer of mulch or compost to retain moisture and improve soil health.

Remember, the frequency of application may vary depending on the type of compost tea and the stage of growth of your cannabis plant. It is recommended to apply it once a week, especially during the vegetative stage, and every two weeks during the flowering stage. Additionally, you can apply compost tea as a foliar spray, but ensure that you do it during low humidity periods to avoid mold growth.

How Much Compost Tea to Use

It can be perplexing to determine how much compost tea to use on your cannabis plants. There are a few factors that can affect the appropriate amount of compost tea to apply, such as the plant’s size and the quality of the soil. Here are some general guidelines to keep in mind:

For seedlings and small plants:

  • Use a spray bottle to apply a fine mist of compost tea on the leaves and soil around the plant.
  • Apply compost tea once a week until the plant reaches a size where normal watering is appropriate.

For medium-sized plants:

  • Use a watering can to apply compost tea to the soil around the base of the plant.
  • Apply compost tea every two weeks to promote healthy growth and development.

For larger plants:

  • Use a hose-end sprayer or garden sprayer to apply compost tea over the entire plant, including leaves and soil.
  • Apply compost tea every two to three weeks during the growing season for best results.

It’s important to note that compost tea should not be applied in excessive amounts, as this can lead to nutrient burn and other negative effects on your plants. Start with a small amount and gradually increase as needed based on your observations of the plant’s response. Remember to always use high-quality compost and follow safe handling procedures when making and applying compost tea.

Compost Tea Recipe for Cannabis Plants

A great recipe for compost tea for cannabis plants is easy to make with just a few simple ingredients. Here’s how to make your own nutrient-rich compost tea:

Ingredients Amount
Compost 1 gallon
Unsulfured molasses 1/4 cup
Worm castings or vermicompost 1 cup
Water 1-2 gallons

To make the compost tea, follow these steps:

1. Fill a 5-gallon bucket with water and add 1 gallon of compost.

2. Add 1/4 cup of unsulfured molasses to the bucket. The molasses feeds beneficial bacteria and fungi, which will thrive in the aerobic environment of the compost tea.

3. Add 1 cup of worm castings or vermicompost to the bucket. These are rich sources of beneficial microbes and nutrients, which will increase the fertility of the compost tea.

4. Stir the mixture well. Aerate the compost tea by stirring it with a stick or drill with a paint mixing attachment. You can also use a bubbler or aerator to oxygenate the tea.

5. Cover the bucket and let it steep for 24-48 hours, stirring occasionally. The longer you let it steep, the more nutrients and microbes will be released into the tea.

6. Strain the compost tea through a fine mesh bag or cheesecloth to remove any solids. Dilute the tea with additional water until it is the color of weak tea.

7. Apply the compost tea to your cannabis plants’ soil or foliage using a watering can or sprayer. Avoid applying the tea to the leaves during the daytime, as this can lead to sunburn. Apply the tea in the early morning or late evening when the temperature is cooler.

By making your own compost tea, you can provide your cannabis plants with a rich source of nutrients, microbes, and beneficial fungi that will improve soil health, increase plant growth, and boost yields.

How Compost Tea Helps Your Cannabis Plants

As a cannabis grower, you want your plants to thrive and produce lush buds. One way to promote healthy growth is by using compost tea. This natural, organic fertilizer provides numerous benefits for your cannabis plants. By improving soil health, boosting nutrient uptake, and supporting beneficial soil microbes, compost tea can significantly improve the performance of your cannabis crop. Let’s take a closer look at how compost tea helps your cannabis plants.

Improves Soil Health

One of the key benefits of compost tea for cannabis plants is that it improves the overall health of the soil. Soil health is crucial for the success of your cannabis crop, as it is the foundation upon which your plants grow. Here are some of the ways that compost tea helps to improve soil health:

  • Increases soil biodiversity: Compost tea is rich in beneficial microorganisms that can help to establish a diverse and thriving soil microbiome. This microbiome is essential for maintaining healthy soil structure, breaking down organic matter, and cycling nutrients.
  • Enhances nutrient availability: The microorganisms in compost tea help to break down organic matter in the soil, releasing nutrients that can be taken up by plant roots. This can lead to better nutrient availability and uptake, which can support healthy plant growth.
  • Improves soil structure: The organic matter in compost tea can help to improve soil structure by binding soil particles together and creating pore spaces for water and air. This can improve soil aeration and drainage, which can support healthy root development.
  • Suppresses soil-borne pathogens: Some of the microorganisms present in compost tea have been shown to have antifungal and antibacterial properties. Applying compost tea to your soil can help to suppress harmful pathogens that can damage your cannabis plants.

By improving soil health, compost tea can help to create a more hospitable growing environment for your cannabis plants. This can lead to healthier plants, better yields, and greater resilience to stressors like pests and diseases.

Boosts Nutrient Uptake

Compost tea has been shown to boost nutrient uptake in cannabis plants. When applied to the soil, compost tea helps to break down organic matter, making essential nutrients such as nitrogen, phosphorous, and potassium more accessible to your plants.

Nitrogen (N): Nitrogen is an essential nutrient that plays a critical role in the growth and development of cannabis plants. It is a key component of chlorophyll, the compound responsible for photosynthesis, and is necessary for the production of amino acids and proteins.

Phosphorous (P): Phosphorous is necessary for the development of healthy roots and blooms in cannabis plants. It helps to transfer energy throughout the plant and is essential for the production of nucleic acids, which are necessary for DNA replication.

Potassium (K): Potassium is essential for the overall health and growth of cannabis plants. It plays a critical role in regulating water uptake, improving stress tolerance, and increasing disease resistance in plants.

By increasing the availability of these key nutrients, compost tea can help cannabis plants to thrive and reach their full potential. Additionally, the beneficial microbes found in compost tea can help to improve the overall health of the soil, providing a more fertile ground for your plants to grow in.

Increases Plant Growth and Yield

Compost tea is an organic fertilizer that can help increase plant growth and yield. This is because compost tea is full of beneficial microorganisms and nutrients that are easily absorbed by cannabis plants. Here are some ways that compost tea can increase the growth and yield of your cannabis plants:

  • Improves root development: Compost tea contains beneficial bacteria and fungi that can help stimulate root growth. This leads to healthier, more robust plants that can absorb more water and nutrients from the soil.
  • Increases nutrient uptake: Compost tea is full of essential nutrients like nitrogen, phosphorus, and potassium (NPK). These nutrients are in easily absorbable forms that can be taken up by your plants. When your plants have access to these nutrients, they can grow bigger and produce higher yields.
  • Encourages flowering: Compost tea is also rich in trace minerals like calcium, magnesium, and iron. These minerals are essential for plant growth and can help your cannabis plants flower earlier and more abundantly.
  • Reduces stress: When plants are stressed (for example, by pests, disease, or extreme temperatures), their growth and yield can suffer. Compost tea contains microorganisms that can help plants cope with stress by improving their immune systems and making them more resistant to disease.

All of these benefits can lead to healthier, more productive cannabis plants. By incorporating compost tea into your growing regimen, you can help your plants reach their full potential and produce the highest quality buds possible.

Supports Beneficial Soil Microbes

Compost tea is not just beneficial for the cannabis plants, but for the entire soil ecosystem. One of the key advantages of using compost tea is that it supports beneficial soil microbes. These microbes play a critical role in the soil food web and help to break down organic matter, suppress pests and diseases, and make nutrients available to the plants.

What are Soil Microbes?

Soil microbes are tiny living organisms that exist in soil. They include bacteria, fungi, nematodes, protozoa and many other species. These microbes provide many important benefits to the soil, plants and the environment.

How does Compost Tea Help Soil Microbes?

Compost tea contains a plethora of beneficial microorganisms that help to support healthy soil ecology. When applied to soil, the microorganisms present in the compost tea help to colonize the soil and improve its overall health. Compost tea serves as a medium for the rapid multiplication of these beneficial microorganisms, allowing them to reach higher populations than would otherwise be possible.

The microorganisms that are present in the compost tea help to convert the organic matter into nutrients that are more easily taken up by the plants. Similarly, they help to suppress the growth of harmful bacteria and fungi that can be detrimental to plant growth. Beneficial soil microbes can help to improve soil structure, water retention and nutrient cycling.

Types of Soil Microbes

There are many different types of soil microbes and each has its own specific function in the soil food web. Some of the most common types of beneficial soil microbes that are found in compost tea include:

Type of Microbe Role in Soil Ecology
Bacteria Break down organic matter, fix nitrogen, promote plant growth
Fungi Maintain soil structure, break down tough organic matter, nutrient cycling
Protozoa Eat bacteria and fungi, release nutrients back into the soil
Nematodes Eat bacteria and fungi, promote plant growth


Compost tea provides a rich source of beneficial soil microbes that help to support soil health and plant growth. By creating a healthy soil food web, compost tea can help to increase plant yields and ensure the long-term health of the soil. Incorporating compost tea into your cannabis cultivation routine is an easy and effective way to improve the overall health of your plants and soil.


In conclusion, compost tea is a valuable tool to add to your cannabis gardening arsenal, as it provides numerous benefits to your plants and overall soil health. By making compost tea at home, you can tailor the ingredients to fit the specific needs of your cannabis plants, ensuring that they receive the necessary nutrients and beneficial microbes to thrive.

However, it is important to note that compost tea should not be used as a replacement for proper soil preparation and maintenance. While compost tea can improve soil health and boost plant growth, it cannot compensate for poor soil quality or lack of proper nutrients.

Additionally, it is essential to use caution when applying compost tea to your plants, as overuse or incorrect application can lead to potential problems such as nutrient burn or harmful bacterial growth. It is always recommended to start with a small amount of compost tea and monitor your plants’ response before increasing the dosage.

Overall, compost tea is a beneficial supplement to any cannabis gardening routine when used properly and in conjunction with other best practices for soil preparation and maintenance. By incorporating compost tea into your gardening practices, you can improve your plant’s health, boost yield, and ultimately, produce higher quality cannabis.

Frequently Asked Questions

What are the benefits of using compost tea on cannabis plants?

Compost tea adds beneficial microorganisms to your soil, improving soil health and nutrient uptake, which results in increased growth and yield.

Can I use store-bought compost to make compost tea?

Yes, but it’s best to use homemade compost to ensure it’s free from chemicals and pathogens.

How often should I apply compost tea to my cannabis plants?

It’s recommended to apply compost tea once a week during the vegetative stage and once every two weeks during the flowering stage.

Can I use compost tea as a foliar spray?

Yes, foliar spraying with compost tea can improve leaf health and provide additional nutrients.

Can compost tea be used in hydroponic systems?

Compost tea is not recommended for use in hydroponic systems as it can clog pumps and filters.

How do I store leftover compost tea?

Compost tea can be stored in a cool, dark place for up to 24 hours. It’s best to use it fresh for maximum benefits.

Can compost tea be made without an aerator?

No, an aerator is necessary to provide oxygen for the growth of beneficial microorganisms.

Can adding too much compost tea harm my cannabis plants?

Excessive use of compost tea may cause nutrient burn, so it’s important to follow recommended application rates.

Can compost tea be used on all types of cannabis plants?

Yes, compost tea can be used on all types of cannabis plants, including both indoor and outdoor plants.

Does compost tea have a strong odor?

Compost tea may have a slight odor, but it should not be unpleasant if made and stored properly.


We will be happy to hear your thoughts

Leave a reply

Solve : *
2 × 27 =

420 Grow Radar