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How to Make Compost Tea For Blooming Plants

How to Make Compost Tea For Blooming Plants

Enhance flavor and yields by applying a compost tea during the bloom cycle

Compost-T (bloom)

  • 1 cup DNC Wormcastings
  • 5 Tablespoons Organic Unsulfured Blackstrap Molasses
  • 1/2 cup alfalfa meal
  • 2/3 cup Peruvian sea bird guano
  • 2/3 cup bat guano
  • 5 gallons of water

Bubble for 72 hours

Adding a compost tea to your living soil recharges it with fresh microorganisms.  These microbes decompose the organic matter in your container for food, making it easier for your plants to uptake nutrients.  

Some other benefits of compost tea application include: enhancing your plant's health by suppressing pathogens and disease, working synergistically with biological pest controls, and increasing your soil's ability to hold water.

When it comes to application of your tea, you have two options: foliar feeding or root drenching.  Application by foliar feeding will repel pathogens living on your plant's leaves.  Root drenching enhances the synergistic relationship between the plant's root system and the microorganisms in your living soil.

Always use your tea within 24-30 hours after the tea was made and started bubbling.  During this time your tea will have maximum microbial life.  A good foam on top of your tea is a sign that your microbes are active.

Compost teas are a great addition to your soil container, but don't overdo the application rate.  Use once every 2 weeks during the bloom cycle.

What are the benefits of a properly made AACT?
There are many:

  1. Increased blossoms and yields
    2. Increased pest and disease resistance
    3. Increased breakdown of toxins in your soil
    4. Increased water holding capacity
    5. It's 100% safe and all natural
    6. Most important to me -- increased quality and taste in whatever it is you are growing
    7. If you are growing outdoors, they also increase frost resistance
    8. Compost Tea is inexpensive to make, so in "bang for your buck" it's well worth your time

A very effective AACT maker can be built for under $50 and pretty much anyone can do it (See Photo 1)

tools for making compost tea brewer
First is the bright orange five gallon bucket and secure lid. (Note: A five-gallon bucket only makes about four gallons of tea!)

F1 - A dual output aquarium pump for a 60-80 gallon aquarium. The more air the better the tea and the less chance of it going anaerobic or having anaerobic pockets.
F2 - Medium air stones
F3 - Small air stones
F4 - Two brass (not plastic) T-fittings
F5 - About 10' aquarium hose
F6 - Drill motor and 1/4-in drill bit
F7 - A pressurized paint sprayer strainer, available at any paint store (or if need be, an old nylon)

Drill two 1/4-inch holes in the side of the bucket near the top, just below where the lid would seal. (See Photo 2) Next you will need a sharp pair of scissors to cut your hose into six pieces -- two approximately three feet and four approximately six inches.

make your own compost tea brewer
Attach one air stone to the end of all four smaller pieces of hose. Attach the two hoses connected to the small air stones to one brass T and the larger air stones to the other brass T. Pull your two larger sections of hose through the 1/4-inch holes you have drilled in the side of your bucket. Connect the end of the longer hoses outside the bucket to the two outputs on the aquarium pump.

Connect the brass T with the larger air stones to one of the hoses inside the bucket (See Photo 3).

Next the T with the small air stones will be placed inside the paint sprayer strainer and the bag should be filled with 1 to 1.5 pounds of Detroit Nutrient Company Worm Castings. (This is the compost tea bag.) Then the T should be connected to the remaining hose inside the bucket, and the top of the bag should be tied shut (See Photo 4).

compost tea for blooming plants
At this point you are done with the construction of the AACT maker or 'Kettle' as I call it.

Now comes the ingredients:

First, dechlorinated water or better yet, 5-gallons of water from a rain barrel or a pond. If you don't have access to either of those, just leave a five-gallon bucket of water out for 24 hours to dechlorinate.

Add water to your bucket with your large air stones at the bottom of the bucket and your bag of aerated vermicompost (worm castings) inside with your aquarium pump plugged in. A basic recipe for a good compost tea would be to add about one teaspoon to two ounces of unsulfured, blackstrap molasses, 1/2 cup humic acid and one to three tablespoons of sea kelp.


After 8-12 hours, remove the worm casting tea bag and put just the connected air stones back into the kettle. You want your tea to brew between 24-72 hours in a nice cool dark place. More important than the exact temperature is making sure the temperature is evenly maintained and most important is to keep the pump running and air flowing.

My suggestion is to start with a little less than a recipe calls for unless you are an expert. Watch to see how your plants respond and adjust as necessary. I normally mix a gallon of tea to four gallons of dechlorinated, aerated water or dilute the tea to a light brown color.

Once you have made your tea and let it brew for 24-72 hours, you want to use it quickly. Tea has a short shelf life -- especially once you remove the air stones.

Use Your Nose

Caregivers are especially conscious of smell. Once your tea loses its sweet and earthy smell, it will get a stale 'vomit' smell. Your tea is bad at that point. Throw it away -- not on your garden. I dump it on the ground behind my house.

Now you have made a compost tea kettle and your first batch of tea. For more recipes check out our website or Detroit Nutrient Company on Facebook.  Feel free to share your recipe ideas with me.

Good Luck and Keep Michigan Growing!

Worm Compost Tea for Veg

Compost Tea for Bloom

Need more guidance?  Watch this video where Tommy will walk you through the process of making your own compost tea.

Our bloom tea recipe is an AACT (Actively Aerated Compost Tea).  In this video, Tommy will show you the equipment you'll need to brew your own tea.  For information on building your own brewing system, read our Worm Compost Tea Workshop .

A fun and entertaining look at making a simple compost tea using Vermicompost for compost, Unsulfured Blackstrap Molasses for sugars along with Alfalfa Meal, Fish&Kelp and Guanos. Be sure to watch all the way to the end for the Blooper Reel! For additional information or for a postcard with tea recipes please email and check out Detroit Nutrient Company on Instagram or Great Lakes Water Only on Facebook

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Gregory Dotson - September 15, 2020

How to be successful?
For a 66 year old?

Dan - September 15, 2020

Your Flowering compost tea Recipe calling for 5 Tablespoons of Molasses, is that per gallon?

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