
Compost tea can be a game-changer for your lawn, promoting a healthy and resilient turf. It's made by steeping compost in water, which infuses beneficial microorganisms into the liquid.
These microorganisms help break down thatch and other organic matter, improving soil structure and aeration. This leads to a stronger, more drought-resistant lawn.
By using compost tea, you can reduce your reliance on synthetic fertilizers and pesticides. This is especially beneficial for the environment and your family's health.
Regular applications of compost tea can also help to suppress diseases and pests that can harm your lawn. This is because the beneficial microorganisms in the tea outcompete pathogens and pests for resources.
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What Is Compost Tea
Compost tea is a liquid solution made by steeping compost in water, allowing the beneficial microbes to infuse into the liquid. This process can take anywhere from a few hours to a full day, depending on the desired strength of the tea.
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The steeping process is crucial because it releases the beneficial microbes from the compost, making them available to the plants. This is especially important because these microbes are what help to fight off diseases and pests in the lawn.
Compost tea is often referred to as a "fertilizer" because it provides essential nutrients to the plants, but it's actually more like a health supplement for the soil. It's not a replacement for regular fertilizers, but rather a way to give the soil a boost.
A typical recipe for compost tea involves steeping 5-10% compost in water for a few hours, then straining the liquid and using it as a foliar spray or soil drench. The exact ratio of compost to water can vary depending on the specific needs of the lawn.
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Benefits and Uses
Using compost tea on your lawn offers numerous benefits, including better nutrient absorption and improved soil structure. This leads to a healthier, more resilient lawn that requires less maintenance over time.
Compost tea promotes beneficial microorganisms, which helps increase resistance to pests and diseases. Reduced need for chemical fertilizers is another advantage of using compost tea.
Here are some of the key benefits of using compost tea on your lawn:
- Better nutrient absorption
- Improved soil structure
- Increased resistance to pests and diseases
- Promotion of beneficial microorganisms
- Reduced need for chemical fertilizers
Benefits of Using
Using compost tea on your lawn can greatly improve the health and resilience of your grass. Compost tea offers better nutrient absorption, which is especially helpful during periods of drought or extreme weather conditions.
One of the key benefits of compost tea is its ability to improve soil structure. This is achieved by promoting beneficial microorganisms in the soil, which in turn break down organic matter and create a more stable and fertile environment.
By using compost tea, you can significantly reduce your need for chemical fertilizers. This is a huge advantage, as chemical fertilizers can have negative impacts on the environment and your health.
Compost tea also increases resistance to pests and diseases, making it a great natural solution for lawn care. This is because the beneficial microorganisms in compost tea help to create a healthy and balanced ecosystem in the soil.
Here are the specific benefits of using compost tea:
- Better nutrient absorption
- Improved soil structure
- Increased resistance to pests and diseases
- Promotion of beneficial microorganisms
- Reduced need for chemical fertilizers
Alternative Uses

Compost tea is a versatile tool that can be used in a variety of ways beyond just lawn care.
You can use compost tea as a compost activator to help speed up the decomposition process in your compost pile.
It's also a natural pest deterrent when sprayed on plant leaves, providing an alternative to chemical pesticides.
Compost tea can be used as a foliar spray to give your plants an extra boost of nutrients.
Spraying it on plant leaves can also help to prevent diseases and promote healthy growth.
Compost tea is a nutrient-rich liquid that can be used as a soil drench for potted plants, providing them with essential nutrients.
Here are some of the alternative uses for compost tea:
- Compost activator for your compost pile
- Foliar spray for plants
- Natural pest deterrent when sprayed on plant leaves
- Nutrient boost for vegetable gardens
- Soil drench for potted plants
Ingredients and Nutrients
Creating effective compost tea requires a balanced mix of ingredients. The key components include carbon-rich "browns" and nitrogen-rich "greens". Carbon-rich materials like dead leaves, straw, shredded paper, and wood chips provide energy for microorganisms. Nitrogen-rich materials like grass clippings, vegetable scraps, coffee grounds, and fresh plant trimmings supply the protein necessary for microbial growth.
Adding supplementary nutrients can further enhance your compost tea. Roger Cook recommends adding 12 ounces each of molasses, liquid kelp, and fish hydrolysate. These additions can boost the nutrient content and microbial activity of your brew.
Compost tea contains important macronutrients like magnesium and potassium, as well as helpful micronutrients like iron and zinc. These nutrients can be applied to your lawn to boost overall soil quality.
Essential Ingredients
Compost tea requires a balanced mix of ingredients to be effective. A key component is nitrogen-rich materials, which supply the protein necessary for microbial growth.
Grass clippings, vegetable scraps, coffee grounds, and fresh plant trimmings are all great examples of nitrogen-rich materials that can help create a diverse and active microbial population in your compost tea.
Adding supplementary nutrients can also enhance your compost tea. Roger Cook recommends adding 12 ounces each of molasses, liquid kelp, and fish hydrolysate.
These additions can boost the nutrient content and microbial activity of your brew, making it a powerful fertilizer for your lawn.
Carbon-Rich "Browns"
Carbon-rich materials, often referred to as "browns", are the foundation of your compost tea. They provide energy for microorganisms and help maintain the proper balance in your brew.
Dead leaves, straw, shredded paper, and wood chips are all examples of carbon-rich materials.
These ingredients are essential for creating a healthy compost tea, as they help to feed the microorganisms that break down the organic matter.
Some common carbon-rich materials that you can use in your compost tea include dead leaves and straw.
Making and Applying
Making compost tea requires a high-quality compost blend, with Terrill recommending a mix of 30% vermicompost and 70% compost. This blend is then added to 250 gallons of water and brewed for 24 to 48 hours in a GEOTEA brewer.
The brewer maintains dissolved oxygen levels above 6 ppm, and the tea is monitored throughout the brew cycle to ensure it's biologically rich and diverse. Terrill takes samples and examines them with microscopes to check the population and diversity of bacteria, fungi, protozoa, and nematodes.
Compost tea must be applied within four to six hours after removing oxygen, so it's essential to have a plan in place for transportation and application. Dane Terrill uses a diaphragm pump and a spray gun to apply the tea, and recommends using a diaphragm pump instead of a centrifugal pump to avoid shredding microorganisms.
Application
To apply compost tea effectively, it's essential to do so within four to six hours after removing oxygen. This ensures the beneficial microbes in the tea remain active.
Compost tea can be applied using a pump sprayer for smaller lawns, while a backpack or walk-behind sprayer is better suited for larger areas. One gallon of tea covers about 1,000 square feet.
A diaphragm pump is recommended for compost tea application, as it preserves the delicate microorganisms, unlike some centrifugal pumps that can shred them. This is especially important for maintaining the tea's effectiveness.
Compost tea doesn't just benefit the soil, but also the leaves and grass, making it a great option for foliar feeding. It's also absorbed by the plants, providing them with essential nutrients.
How To Make

To make compost tea, you'll need a quality compost/vermicompost blend, specifically 8 quarts of it. Flowerfield's compost tea is made by agitating and aerating this blend in 250 gallons of water using a GEOTEA brewer.
The starting material is crucial, so use high-quality thermophilic compost and vermicompost. Flowerfield mixes 30 percent vermicompost and 70 percent compost to produce tea with the best attributes.
Add fish hydrosylate, humic acid, and kelp to the brewer, and brew the mix for 24 to 48 hours. The aerated brewer maintains dissolved oxygen levels above 6 ppm.
The population and diversity of bacteria, fungi, protozoa, and nematodes determine the quality of the tea. Flowerfield monitors the oxygen content throughout the brew cycle and takes samples to ensure a biologically rich and diverse compost tea.
If using chlorinated city water, aerate it to off gas the chlorine. Adding humic acid or ascorbic acid will also complex the chlorines, allowing microorganisms to live and proliferate.
For your interest: Vermicompost Tea

To make your own compost tea, you'll need a barrel and an aerator. Connect the barrel to the downspout and secure the aerator to the end of the tubing coming out of the barrel.
Once the barrel is full of rainwater, run the aerator for at least 24 hours. If using tap water, aerate for 20 minutes before adding compost.
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Troubleshooting and Tips
If you're experiencing a cloudy compost tea, it's likely due to too much oxygen in the mixture, which can be solved by using a breathable bag or aerating the tea regularly.
Even with careful preparation, you may face some challenges when making or using compost tea.
Cloudy compost tea can also be caused by an imbalance of beneficial microbes, which can be corrected by using a starter culture or increasing the aeration time.
You may face some challenges when making or using compost tea, but with these solutions, you'll be back on track in no time.
If your compost tea is too thick, try adding a little more water or using a finer mesh bag to allow for better liquid flow.
Troubleshooting Common Issues With Compost Tea can help you overcome these challenges.
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Organic Lawn Care
Organic lawn care is all about creating a healthy environment for your grass to thrive. Organic compost tea can have a number of positive effects on your lawn, including increasing microorganisms and improving soil quality.
Applying organic compost tea to your lawn can be done easily and effectively. The lawn will green up quickly, so results are seen right away.
By using compost tea, you can trust that you're utilizing a safe, organic solution that excludes pesticides and synthetic chemicals. This is a great way to give your lawn a mid-season boost, especially during the application process when the aerated compost tea is blanket applied to the entire lawn.
Recommended read: Organic Compost Tea
Aids Weed Control
Adding compost tea to your lawn can improve soil quality, which in effect, can discourage weed growth.
Some weeds thrive in lawns that don’t contain a sufficient amount of nutrients, making compost tea a valuable tool in weed control.
By improving soil quality, compost tea can help create an environment that's less conducive to weed growth, making it easier to maintain a healthy and weed-free lawn.
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Organic Lawn Care
Organic lawn care is a game-changer for a lush and healthy lawn. Organic compost tea is a key part of this approach, and it's like the "espresso" version of compost.
Applying organic compost tea to your lawn can give it a mid-season boost, and you'll see results right away. The lawn will green up quickly.
Compost tea can improve soil quality, which is essential for a healthy lawn. By adding compost tea to your lawn care plan, you can trust that you're using a safe, organic solution that excludes pesticides and synthetic chemicals.
Adding compost tea can also help with weed control by improving soil quality. This can discourage weed growth, especially in lawns that don't contain enough nutrients.
Organic compost tea can increase microorganisms in the soil, which is vital for a healthy lawn. This can lead to a stronger, more resilient lawn.
Additional reading: Organic Lawn Care Program
Frequently Asked Questions
What is the disadvantage of compost tea?
Compost tea may contain deadly pathogens like E. coli, Salmonella, and Listeria if not made from properly heated and regulated compost. This risk is especially high if the compost contains animal manure.
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