What is Compost Tea and How it Benefits Cannabis Plants

As cannabis becomes a more widely accepted and cultivated crop, many growers are looking for ways to improve the quality and yield of their plants. While there are many chemical fertilizers and pesticides available on the market, many growers are turning to more natural methods of cultivation. Compost tea is one such method that has been gaining popularity in recent years. But what exactly is compost tea and how can it benefit cannabis plants? In this article, we will explore the ins and outs of compost tea and provide a step-by-step guide on how to make and use it for your cannabis crop.

What is Compost Tea?


What Is Compost Tea?
For cannabis growers seeking natural and organic alternatives to synthetic fertilizers, compost tea may be the answer. But what exactly is compost tea? To understand this powerful liquid fertilizer, we need to first delve into the world of composting. Through a natural process of decomposition, organic matter like food scraps and yard waste break down into nutrient-rich compost, which can then be brewed into a potent tea that provides cannabis plants with a wide range of benefits. Let’s explore the basics of composting and how it leads to the creation of compost tea.

A Brief Overview of Composting

Composting is the natural process of breaking down organic waste materials into nutrient-rich soil called compost. Organic waste includes food scraps, yard waste, and other biodegradable materials. Composting is an environmentally friendly way of reducing waste and creating a valuable resource for gardening and farming.

Composting requires several key components such as carbon-rich materials (e.g., dried leaves, hay, straw), nitrogen-rich materials (e.g., kitchen scraps, grass clippings), and water. These components are typically layered together in a compost bin or pile to create an ideal environment for microorganisms to break down the materials.

As the microorganisms feed on the materials, they create heat, which helps to accelerate the composting process. The end result is a dark brown, crumbly substance that smells earthy and is full of nutrients. Compost is an excellent soil amendment that can improve soil structure, increase water retention, and provide essential nutrients for plants to grow.

Composting is a natural process that converts organic waste materials into nutrient-rich soil called compost. By reducing waste and creating a valuable resource for gardening and farming, composting is an eco-friendly way to improve soil health and support plant growth.

What is Compost Tea?

Compost tea is a liquid form of compost that you can use to nourish your plants. It is basically a solution made by steeping compost in water. The resulting liquid is rich in nutrients, beneficial microorganisms, and organic matter that can help to promote soil health and plant growth.

What makes compost tea different from regular compost?

Compost tea is different from regular compost because it can be directly absorbed by plant roots or applied as a foliar spray. This allows the nutrients and microbes found in the tea to be easily taken up by the plant. Regular compost, on the other hand, needs to be broken down by soil organisms before it can be used by plants.

What are the benefits of using compost tea?

There are many benefits to using compost tea. It can improve soil health and structure, reduce the incidence of plant diseases and pests, increase nutrient absorption, and enhance plant yield and quality. It is also an environmentally friendly way to fertilize your plants, as it helps to reduce waste and promote sustainable gardening practices.

What is in compost tea?

Compost tea contains a rich blend of nutrients, including nitrogen, phosphorus, and potassium, as well as trace minerals and vitamins. It also contains beneficial microorganisms such as bacteria, fungi, and protozoa, which help to break down organic matter and make nutrients more readily available to plants.

How is compost tea made?

Compost tea can be made using various recipes and methods, but the basic idea is to steep compost in water for a period of time, often with the addition of other ingredients to enhance the nutrient content or microbial diversity. Some common ingredients used in compost tea recipes include molasses, kelp meal, fish emulsion, and humic acid.

Types of Compost Tea

Compost tea comes in several types, each with its own unique benefits for growing cannabis plants. Below are some of the most common types of compost tea:

  • Aerated Compost Tea: This type of compost tea is made by adding compost to a container of water and aerating the mixture with an air pump. The aerator helps to create a strongly oxygenated environment which encourages the growth of beneficial microorganisms such as fungi and bacteria. Aerated compost tea is rich in nutrients and has been shown to improve soil structure and promote plant growth.
  • Non-aerated Compost Tea: As the name suggests, non-aerated compost tea is made by steeping compost in water without adding oxygen. This type of compost tea is generally less nutrient-rich than its aerated counterpart, but can still provide some benefits to cannabis plants. Non-aerated compost tea is particularly useful for introducing beneficial microorganisms to the soil, which helps to promote healthy root growth and reduce the risk of soil-borne diseases.
  • Bubble Compost Tea: This type of compost tea is made by adding compost to a container of water and using a diffuser to create small bubbles. The bubbles help to keep the compost in suspension and encourage the growth of beneficial microorganisms. Bubble compost tea is particularly effective at promoting soil health, reducing soil-borne diseases, and improving nutrient absorption.
  • Manure Tea: This type of compost tea is made by steeping manure in water. Although manure tea can be high in nutrients, it is also more likely to contain harmful microorganisms that can cause plant disease. As a result, it is important to use caution when using manure tea and ensure that it is composted properly before use.

Each type of compost tea has its own unique benefits and can be used to promote healthy growth and development in cannabis plants. It is important to select the right type of compost tea for your specific needs and to follow proper safety precautions when preparing and using compost tea.

Compost Tea Benefits for Cannabis Plants

Compost Tea Benefits For Cannabis Plants
As a cannabis grower, it’s important to understand the many benefits of using compost tea in your cultivation. Compost tea is a natural fertilizer that is rich in nutrients and beneficial microorganisms, which can significantly enhance the growth and health of your cannabis plants. Using compost tea can improve soil health, reduce pests and diseases, enhance yield, and increase nutrient absorption. In the following sections, we’ll explore each of these benefits in more detail, so you can understand just how valuable compost tea can be for your cannabis plants.

Improves Soil Health

Compost tea is an organic and natural way to improve your soil health. When applied to the soil, it introduces beneficial microorganisms that can rebuild the soil structure and increase its nutrient content. Here are some of the benefits of using compost tea to improve soil health:

  • Enriches soil with beneficial microorganisms: Compost tea is packed with microorganisms such as bacteria, fungi, and protozoa that can help break down organic matter in the soil into nutrients that plants can absorb. These microorganisms also secrete hormones and enzymes that promote plant growth and protect them from disease.
  • Increases soil fertility: Compost tea provides a rich source of macro and micronutrients that are essential for plant growth. It contains nitrogen, phosphorus, potassium, calcium, magnesium, and other trace minerals that can boost soil fertility and enhance plant growth.
  • Retains soil moisture: Compost tea helps the soil retain moisture, reducing the need for frequent watering. This is especially important during periods of drought or when growing in sandy or porous soils.
  • Improves soil structure: Compost tea contains humic and fulvic acids that can break down clay particles and improve soil structure. This can increase soil porosity and water retention, making it easier for plant roots to penetrate the soil and access nutrients.
  • Prevents soil erosion: Compost tea can strengthen the soil structure, preventing soil erosion caused by wind and water. This can help protect your plants and prevent soil loss that can negatively impact your garden.

Using compost tea can help you re-establish your soil’s ecological balance, making it easier to grow healthy and thriving cannabis plants.

Reduces Pests and Diseases

Compost tea has been found to be an effective solution to reduce pests and diseases in cannabis plants. When cannabis plants are grown in healthy soil, they are less susceptible to various pests and diseases. Compost tea helps in creating a healthy soil environment, which in turn reduces the need for using harmful chemicals to protect the plants.

Here are some of the ways in which compost tea helps prevent pests and diseases:

  • Boosts soil health: Compost tea contains beneficial microorganisms like bacteria, fungi, protozoa, and nematodes that help in maintaining a healthy soil environment. These microorganisms help in breaking down organic matter and making essential nutrients available to the plants. When the soil is rich in nutrients, it protects the plants from various pests and diseases.
  • Biocontrol: Certain strains of microorganisms present in compost tea have been found to be effective in controlling pests and diseases. For example, Bacillus thuringiensis is a type of bacterium that produces a toxin that can kill various types of caterpillars, which are common pests in cannabis plants. Another example is Trichoderma fungi, which can help in controlling root rot and other soil-borne diseases.
  • Improves plant defense: Compost tea helps in enhancing the plant’s natural defense mechanisms against pests and diseases. By providing the necessary nutrients and microorganisms, the plants can develop a stronger immune system, which makes them less susceptible to various diseases.
  • Reduces pest attraction: Certain pests are attracted to unhealthy plants. When the plants are stressed or lacking essential nutrients, they emit certain chemicals that attract pests. Compost tea helps in maintaining a healthy plant environment, which reduces the attraction of pests to the plants.

Compost tea can help in reducing the need for harmful chemicals to protect your cannabis plants. With regular use of compost tea, you can create a healthy, thriving soil environment that will protect your plants from various pests and diseases.

Enhances Yield and Quality

One of the biggest benefits of using compost tea for growing cannabis is that it enhances both the yield and quality of the plant. How exactly does it do this? Let’s break it down:

Benefit Explanation
Better access to nutrients Compost tea helps to release nutrients in the soil so that they are immediately available to the roots of the cannabis plant. This can lead to stronger, healthier plants with larger yields.
Improved soil structure The microorganisms in compost tea work to break down and loosen soil, creating a more hospitable environment for cannabis roots. This can lead to better water and nutrient retention, as well as improved drainage.
Increased resistance to disease and pests By improving the overall health of the cannabis plant and the soil it grows in, compost tea can help to ward off diseases and pests that can damage or kill the plant. This can lead to a higher quality yield and lower risk of losing plants to pests.
Better taste and aroma Using compost tea can help to improve the taste and aroma of cannabis buds by providing them with the nutrients they need to develop their full potential. This can lead to a more enjoyable smoking experience for the user.

Incorporating compost tea into your cannabis growing routine can have a significant impact on the final product. By enhancing both the yield and quality of your harvest, compost tea can help to ensure that you get the most out of your plants.

Increases Nutrient Absorption

Compost tea has been shown to increase the nutrient absorption of cannabis plants. This is because compost tea helps to break down organic matter and release essential nutrients that may be otherwise unavailable to plants. The beneficial microorganisms in compost tea work to improve the soil structure and create a better environment for roots to absorb nutrients. Here are some specific ways in which compost tea can increase nutrient absorption:

  • Promotes root development: The microorganisms in compost tea help to create a hospitable environment for the growth of roots. This leads to healthier and more robust root systems, which in turn can absorb more nutrients from the soil.
  • Increases soil fertility: Compost tea contains high levels of nitrogen, phosphorus, and potassium, which are essential macronutrients for plants. These nutrients are released slowly over time and can be taken up by plants as needed.
  • Improves nutrient availability: Compost tea helps to break down organic matter in the soil, which increases the availability of nutrients such as iron, zinc, and calcium. This means that plants can absorb a wider range of nutrients and are less likely to suffer from nutrient deficiencies.
  • Reduces nutrient leaching: Nutrients in the soil can easily be washed away by rain or irrigation, but the microorganisms in compost tea help to hold nutrients in place and prevent leaching. This means that plants are more likely to absorb the nutrients they need rather than losing them to the environment.

By increasing nutrient absorption, compost tea can help to improve the overall health and productivity of cannabis plants. However, it is important to note that compost tea should be used in moderation and in conjunction with other fertilizers and soil amendments. Overuse of compost tea can lead to nutrient imbalances and other issues, so it is important to follow guidelines for application and to monitor plants for signs of stress or deficiency.

How to Make Compost Tea for Cannabis Plants

How To Make Compost Tea For Cannabis Plants
Creating compost tea for your cannabis plants is a relatively simple process that can have a significant impact on the health and productivity of your crop. By harnessing the power of composting, you can provide your plants with a natural, nutrient-rich fertilizer that promotes robust growth and a high yield. In this section, we’ll explore the materials you’ll need and go through the steps of making compost tea step-by-step, so you can start using this powerful tool in your cannabis-growing arsenal.

Materials Needed

To make compost tea for your cannabis plants, you will need the following materials:

  • Compost: The main ingredient for making compost tea is high-quality compost. Use compost that is made from a variety of organic materials, such as vegetable scraps, coffee grounds, and yard waste. Avoid using compost that contains pet feces, as it may contain harmful bacteria.
  • Water: Use clean, non-chlorinated water for making compost tea. Chlorine can kill beneficial microorganisms in the compost tea, which reduces its effectiveness.
  • Aeration equipment: To oxygenate the compost tea, you will need an aeration device such as an air pump, air stone, or bubbler.
  • Container: Use a container that is large enough to hold the compost and water, and has a lid to prevent evaporation.
  • Molasses or other sugar source: Adding a sugar source such as molasses to the compost tea can help feed the beneficial microorganisms, which can improve its effectiveness.
  • Strainer or cheesecloth: After the compost tea has brewed, strain it through a strainer or cheesecloth to remove any large particles of compost.
  • Spray bottle (optional): If you plan to use the compost tea as a foliar spray, you will need a spray bottle to apply it to the leaves.

Gathering and preparing these materials ahead of time will help ensure that you have everything you need to make high-quality compost tea for your cannabis plants. It’s important to use high-quality materials and follow proper techniques to maximize the benefits of the compost tea.

Steps to Make Compost Tea

Making compost tea is relatively easy and can be done with just a few materials. Here are the steps to make compost tea for using on cannabis plants:

Materials Needed:

  • A 5-gallon bucket (preferably made of food-grade plastic)
  • Aquarium pump with tube
  • Air stone
  • Filtered water
  • 4-5 cups of compost
  • Molasses or other sugar source (optional)


  1. Fill the 5-gallon bucket with filtered water, leaving a few inches of space at the top.
  2. Add 4-5 cups of compost to the water. The compost can be fresh or aged, but avoid using compost that is moldy, contains pathogens, or has a foul smell.
  3. Optional: add a tablespoon of molasses or other sugar source to the compost tea, which provides a food source for beneficial microbes.
  4. Attach the aquarium pump’s tube to the air stone and place it in the bottom of the bucket, allowing the stone to create a constant stream of small bubbles. This aeration is crucial to maintaining healthy microbial life in the compost tea.
  5. Cover the bucket with a cloth or coffee filter, securing it with a rubber band, to prevent dust or debris from falling in, while still allowing air circulation.
  6. Allow the compost tea to brew for 24-48 hours, stirring the mixture once or twice a day. The tea will be ready when it has a rich, earthy smell and little to no foam on top.
  7. Once the compost tea is finished brewing, pour it through a strainer to remove any large particles of compost, making sure to keep the beneficial microbes in the liquid.
  8. The compost tea is now ready to be used on cannabis plants.

By following these simple steps, you can create a nutrient-dense compost tea that will help improve the health and yield of your cannabis plants.

How to Use Compost Tea for Cannabis Plants

How To Use Compost Tea For Cannabis Plants
Now that you have learned about the benefits of compost tea for cannabis plants and how to make your own, you may be wondering how to use it effectively. Using compost tea correctly can make a significant difference in the health and yield of your cannabis plants. In this section, we will go over the various ways to apply compost tea to your plants, including applying it to the soil and using it as a foliar spray. We will also discuss the frequency of application and provide tips and precautions for using compost tea safely and effectively. So let’s dive in and explore how to use compost tea for your cannabis plants.

Applying Compost Tea to Soil

When it comes to applying compost tea to soil for your cannabis plants, the process is fairly straightforward. Here are the steps you should follow:

  1. Choose a time to apply the tea when the cannabis plants are not in direct sunlight, ideally in the early morning or late evening.
  2. Make sure the soil is moist before application to ensure the tea distributes evenly.
  3. Use a watering can or sprayer to apply the tea to the base of the plants, avoiding direct contact with the leaves.
  4. Apply enough tea to fully saturate the soil around the base of the plants.
  5. After applying the tea, water the soil lightly to ensure the tea has been fully absorbed.

It’s important to note that compost tea should not replace regular watering, but should be used as a supplement to provide additional nutrients and beneficial microorganisms to your cannabis plants. Additionally, it’s important to use the tea within a few hours of brewing to get the most benefits.

Foliar Spraying with Compost Tea

Foliar spraying with compost tea is a method of applying compost tea directly onto the leaves of cannabis plants. This method is particularly useful for providing plants with a quick boost of nutrients and microorganisms.

Benefits of foliar spraying compost tea

  • Increases nutrient absorption: foliar spraying allows nutrients to be directly absorbed by the leaves and transported throughout the plant.
  • Boosts plant growth: the application of compost tea via foliar spraying provides an immediate boost of nutrients and microorganisms to help stimulate growth and development.
  • Helps prevent pest and disease problems: the microorganisms in compost tea can help prevent pest and disease problems by providing a protective coating to the leaves.

How to foliar spray with compost tea

  1. Choose a day with mild temperatures and low humidity to avoid burning the leaves.
  2. Dilute the compost tea with water in a ratio of 1:10. For example, 1 gallon of compost tea should be mixed with 10 gallons of water.
  3. Pour the diluted compost tea solution into a spray bottle or backpack sprayer.
  4. Spray the solution onto the leaves of the cannabis plant until they are visibly wet, but not dripping.
  5. Repeat this process once a week throughout the vegetative phase, and once every two weeks during the flowering phase.

Precautions when foliar spraying with compost tea

  • Avoid spraying during the hottest part of the day as this can cause leaf burn.
  • Do not spray compost tea on flowering buds as this can affect the taste and quality of the cannabis.
  • Always wear gloves and protective clothing when handling compost tea to avoid exposure to harmful bacteria.
  • Keep compost tea refrigerated until it is ready to use to prevent the growth of harmful bacteria.

By foliar spraying compost tea on cannabis plants, growers can reap the benefits of increased nutrient absorption, boosted growth, and pest and disease prevention. However, it is important to take precautions and follow proper dilution and application techniques to ensure the health and safety of the plant and grower.

Frequency of Application

When it comes to applying compost tea to cannabis plants, the frequency of application depends on various factors. One of the most important factors is the stage of growth the plants are in. During the vegetative stage, compost tea can be applied once a week or every other week to promote healthy growth and nutrient absorption. During the flowering stage, it is best to apply compost tea once every two weeks to help enhance the quality and yield of the buds.

It is also important to consider the strength of your compost tea. Using compost tea that is too strong can damage plants, while using too weak of a solution may not provide any benefits at all. A good guideline is to dilute your compost tea at a ratio of 1:5 or 1:10 (compost tea to water) before applying.

Another factor to consider is the health of your plants. If your plants are showing signs of stress or nutrient deficiencies, more frequent applications of compost tea may be necessary. However, if your plants are healthy and thriving, there may not be a need to apply compost tea as frequently.

Lastly, it is important to take into account the environment your plants are in. If your plants are in a hot and dry climate, more frequent applications of compost tea may be necessary to help them retain moisture and nutrients. On the other hand, in a cooler and more humid climate, less frequent applications may be necessary as the soil tends to retain more moisture and nutrients.

It is best to pay attention to the unique needs of your cannabis plants and adjust your compost tea application frequency accordingly. Regularly observing your plants and soil can help you determine the optimal frequency of application for your particular growing conditions.

Tips and Precautions

As with any growing technique, it’s important to take precautions when using compost tea for your cannabis plants. While compost tea can have numerous benefits, it’s essential to follow guidelines and safety measures to ensure the best results. In this section, we’ll explore some tips and precautions for making and applying compost tea to your cannabis plants. By following these guidelines, you can avoid any potential issues and enjoy the full benefits of compost tea for your cannabis garden.

Compost Tea Safety Precautions

When making and using compost tea, it’s important to take certain safety precautions to ensure that the tea is safe for your cannabis plants and for you. Here are some safety precautions to keep in mind:

  • Use only organic ingredients: When making compost tea, it’s important to use only organic ingredients to avoid introducing harmful chemicals or pesticides into the soil or plant.
  • Wash your hands: Always wash your hands before and after making compost tea to prevent the spread of harmful bacteria.
  • Use clean equipment: Use clean equipment when making compost tea to prevent contamination. Rinse all equipment thoroughly with water before and after use.
  • Use proper storage: Store compost tea in a clean, covered container in a cool, dark place to prevent bacterial growth.
  • Do not drink compost tea: Compost tea is not meant for human consumption and can be harmful if ingested. Keep it away from children and pets.
  • Use caution when applying: When applying compost tea to your cannabis plants, wear protective clothing like gloves and goggles to avoid skin irritation or eye damage.
  • Don’t use if it smells bad: If your compost tea has a strong or unpleasant odor, it may be an indication of harmful bacteria, and it’s best not to use it on your plants.

By following these safety precautions, you can ensure that your compost tea is safe to use and will provide your cannabis plants with all the benefits it has to offer.

Tips for Making and Using Compost Tea

Here are some helpful tips for making and using compost tea for cannabis plants:

  • Start with quality compost: The compost you use for your tea should be high quality and free of harmful chemicals. Make sure to avoid using compost that contains any pesticides or herbicides.
  • Use an appropriate brewing container: Make sure that the container you use for brewing the compost tea is large enough to hold the compost and water mixture, and has a lid to prevent contamination from insects or other unwanted materials.
  • Monitor the brewing process: Watch the brewing process closely to make sure that the temperatures remain within the appropriate range (between 60-80°F) and to ensure that the tea is not overbrewed or underbrewed. Keep a timer handy to ensure that you don’t forget to remove the compost tea from the brewing container when it is ready.
  • Apply the tea when the plants are actively growing: For best results, apply the compost tea when the plants are actively growing and in need of nutrients. This will help ensure that the plants are able to absorb the nutrients more effectively.
  • Apply compost tea to the soil and leaves: Apply the compost tea to both the soil and leaves of the plants to achieve maximum benefits. This will help ensure that the beneficial microorganisms are able to colonize both the root zone and the above-ground portions of the plant.
  • Store leftover compost tea properly: If you have leftover compost tea, store it in a sealed container in the refrigerator for up to one week. Do not use tea that has a foul odor or appears to be contaminated.

By following these tips, you can ensure that your compost tea is high quality and effective at improving the health and yield of your cannabis plants.


After learning about the benefits of using compost tea for growing cannabis, it is clear that this natural fertilizer can have a significant impact on the health and productivity of your plants. By providing essential nutrients, improving soil health, reducing pests and diseases, and enhancing yield and quality, compost tea is a valuable addition to any grower’s toolkit.

However, it is important to note that making and using compost tea requires knowledge and care. Proper safety precautions must be taken to prevent the spread of harmful bacteria, and the tea should be brewed and applied correctly in order to avoid over-fertilization or other issues.

That being said, with the right materials and approach, compost tea can be an effective, sustainable, and cost-efficient alternative to synthetic fertilizers. By harnessing the power of natural processes, you can give your cannabis plants the support they need to reach their full potential. So why not give compost tea a try and see the difference it can make for your garden? Your plants (and the environment) will thank you.

Frequently Asked Questions

What makes compost tea better than regular compost for cannabis plants?

Compost tea is richer in nutrients that are more easily absorbed by the cannabis plants, making it a more efficient fertilizer.

Can I buy compost tea or do I need to make it myself?

You can purchase compost tea in many gardening stores, but making it yourself is easy and cost-effective.

Is compost tea safe for cannabis plants?

Compost tea is completely safe for cannabis plants, as long as it is prepared properly and not overused.

Is there a difference in the benefits of aerated and non-aerated compost tea?

Aerated compost tea has more beneficial microorganisms and nutrients, making it more effective in improving soil health and plant growth.

Do I need to use organic compost to make compost tea?

Yes, it is important to use organic compost to avoid any synthetic chemicals or harmful toxins that could harm your cannabis plants.

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

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

Can I make compost tea without a compost tea brewer?

Yes, you can make compost tea without a brewer using a large bucket, some organic compost, and an air pump.

Do I need to dilute compost tea before use?

Yes, it is important to dilute compost tea before use to avoid over-fertilizing your cannabis plants.

What is the best time of day to apply compost tea?

The best time of day to apply compost tea is in the early morning or late afternoon, when the temperature is cooler and there is less risk of evaporation.

Can I use compost tea on other plants besides cannabis?

Yes, compost tea is a great fertilizer for all types of plants and can improve soil health and plant growth in many different species.


We will be happy to hear your thoughts

Leave a reply

Solve : *
10 ⁄ 5 =

420 Grow Radar