Easy Natural Compost Tea for Weed Recipe

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Contents:

• 1. What is a compost tea?
• 2. The benefits of organic teas
• 3. Compost tea ingredients
• 3. a. Compost
• 3. b. Food and nutrients
• 3. c. Oxygen
• 4. What are anaerobic microbes and why are they bad for your plants
• 5. Simple compost tea recipe for weed
• 5. a. Diy compost tea
• 6. Bacterial vs fungal teas
• 7. How to make organic compost teas step-by-step
• 8. How to apply compost tea
• 9. Can i use compost teas in combination with synthetic nutrients?
• 10. In conclusion

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Organic teas are used when growing organically and it's a cheap and effective way to feed your cannabis plants without having to buy fertilizers.

Teas can be made with good compost, they contain nutrients and beneficial microorganisms that enhance plant growth and protect your plant against diseases.

1. What Is A Compost Tea?

A cannabis compost tea is what you get when you soak compost in water, the nutrients in the compost eventually end up in the water and the result is something similar to an organic liquid fertilizer but this fertilizer is full of microorganisms and nutrients that are beneficial for cannabis.

Compost teas for cannabis are the best way to boost an organic grow.

This happens because compost is full of beneficial microorganisms and nutrients, and when you soak it in water, you're basically extracting them into the water, the goal being to enhance plant growth and protect it from diseases by providing those nutrients, beneficial bacteria and fungi to your cannabis, either through foliar feeding or through the soil

Organic compost teas are relatively new in the cannabis world but despite their lack of popularity, it's a great way to enhance plant growth when growing organically, just have in mind that compost teas should never be a replacement for all the nutrients your cannabis need but can be a great complement when growing organically.

2. The Benefits Of Organic Teas

As said above, teas shouldn't be used as an alternative to nutrients but they can be used to boost microorganism life in your organic soil and feed your plant when the soil is running out of nutrients, by doing this, you are feeding nutrients directly to your plant and taking care of the microorganisms present in the soil, which are the being responsible for breaking down and making the nutrients available for your cannabis.

Enhance growth

Compost teas boost microbial life in the soil and increase nutrient absorption, so it will not only enhance root growth but will keep your plants well-fed and keep your medium nutrient-rich. Microbes will do all the heavy lifting for you, rather than your plant trying to break down the nutrition microbes will break it down for your plants allowing the nutrition to become bioavailable much more effectively and use the nutrition when the plant needs it rather than all at once.

Non-toxic

Unlike synthetic fertilizers, compost teas are 100% organic because you're only using natural sources so your tea is chemical and pesticide-free.

Organic cannabis compost teas bring a lot of benefits into your garden.

Improve soil

When done correctly, your compost tea should be well-aerated so when you use it to water the soil, it will aerate it and improve water retention, providing a healthier medium for the roots to grow in.

Protection against diseases

Beneficial microorganisms can boost your plant's immune system and increase resistance against most diseases, also, these microorganisms can create a barrier that will help fight off harmful bacteria.

Cheap and effective

The majority of the materials needed for compost can be found easily and sometimes you might already have them at home, making this a really cheap and effective way to improve your organic grow.

3. Compost Tea Ingredients

Brewing your own compost teas can be quite confusing because of all of the options available, you can use whatever you want as long as you provide 3 basic elements:

• Worm castings
• Food and nutrients
• Oxygen

Compost

The base of all compost teas is good quality, healthy compost and should have a large microorganism population and lots of nutrients.  Having good compost can take a lot of time so if you are looking to make your teas and don't have compost available, you can buy good quality compost at your local grow shop.  If you have the option you should try to avoid compost made with animal manure because all manure contains traces of E. coli. The brewing process should kill that pathogen but it's better to be safe than sorry.

Food and nutrients

Food and nutrients are where you'll be introducing the nutrients your cannabis need and the food for the microorganisms, you don't need to add any extras if your compost is good enough but if you want to take your tea to the next level or you think your compost is not good enough, you can add any of the following ingredients, just have in mind that you can substitute any of them to what suits you better.

Molasses (non-sulfured)

Molasses serve as a food source for the microorganisms while you're growing the tea.

Seaweed or kelp

Seaweed or kelp serves as a food source for fungi that grow while the tea is brewing, also serves to provide a surface for the fungi to attach to and develop.

Basic ingredients needed to make a good cannabis compost tea recipe.

Worm castings

Worm castings are the product obtained after a worm digests organic material. This product provides a lot of broken-down nutrients which are in a form that is readily available for your plant to consume and can also introduce microorganisms. Worm castings work very similarly to using compost containing a consortium of beneficial microbes, the main difference is texture and contents of the castings. While compost is an excellent source of microbes, it can be very heavy and make the soil thick which can lead to overwatering. The amazing part about worm castings is that it contains more humus than compost and also castings areate of the media while still holding plenty of moisture.

Bat guano or meals

Depending on if you're brewing teas for growing or blooming cannabis, you will have to provide a certain type of guano or meal, some guanos/meals are nitrogen-rich and others are rich in phosphorus and potassium, so you should choose carefully based on what you need to provide. Both of these ingredients can boost your plant's immune system and also feeds fungi, thus increasing its population.

Oxygen

Oxygen is vital when brewing organic teas because it allows microorganisms to thrive and can be tricky to get right because microorganisms need more oxygen than whats is available in water so you'll have to get a good air pump and an air stone.

4. What Are Anaerobic Microbes and Why Are They Bad For Your Plants

The reason for oxygen being so important when brewing compost tea is for microbial population. If you are brewing a tea for twenty-four hours or so without any airstone the microbes will become anaerobic. Anaerobic microbes are microbes that are born without any access to oxygen. When microbes become anaerobic you will notice a terrible smell almost similar to ammonia or rotten eggs, if you smell this in your tea spill it out IMMEDIATELY and start fresh!

Anaerobic microbes will be 90 percent slower than regular aerobic microbes and also have the potential to completely lock out the nitrogen to your plant which is a huge issue when in the vegetative stage. If this isn't scary enough for you anaerobic microbes are also potentially toxic to your plant so larger applications can seriously damage or kill your plant. This microbe population you want inside the compost tea will be called aerobic microbes. As long as you have constant oxygen when brewing you will succeed in your tea and have beneficial results.

5. Simple Compost Tea Recipe For Weed

Here's our recommended compost tea recipe, one for the vegetative stage and one for the flowering stage, a said above, you can use whatever you want as long as you provide what your cannabis plants need.

Simple organic compost tea to boost your garden.

Just remember that teas are used to boost your soil, so you should be growing in amended organic soil or feeding your cannabis with organic nutrients because the teas are not a substitute for nutrients. Also, make sure the water is at the right temperature (between 10-25°C) and that the water's pH is between 6.0-7.0.

Diy compost tea

Here's a table to help you make a good compost tea for your cannabis in the vegetative stage, the compost teas for cannabis growing and cannabis flowering is basically the same but you will have to change the minerals you're introducing. So, if you have a good compost available you won't have to add anything else but if you don't have it and can't find it anywhere, you can use any type of nitrogen-rich guano or meal, this way you provide nitrogen which is the mineral cannabis plants need to grow.

Compost tea recipe for cannabis in veg (20L)

Ingredients	Quantity
Compost or guano or meal (high in nitrogen)	2 cups
Worm castings	1 cup
Powdered or liquid kelp/seaweed	1 tbsp
Molasses	120mg

Have in mind that this recipe was designed for when growing in organically amended soil, this is a basic recipe and you can improve it however you want to suit your plant's needs. There's no specific brand or type of guano or meal you should use, as long as it has a high concentration of nitrogen and a lower concentration of phosphorus and potassium, it will work.

Compost tea recipe for cannabis in bloom (20L)

Ingredients	Quantity
Compost or guano or meal (high in phosphorus and potassium)	2 cups
Worm castings	1 cup
Powdered or liquid kelp/seaweed	1 tbsp
Molasses	120mg

As you can see, both tables are similar, the only thing that differs is the minerals you'll introduce, as you may know, flowering cannabis needs more phosphorus and potassium so when brewing a tea for blooming cannabis, you need to introduce Phosphorus and Potassium-rich guano or meal.

Have in mind that although they're quite similar, compost teas are usually called Compost extracts while if you're using guano, molasses, and kelp (among others) is usually called Aerated compost teas.

Also, you can add mycorrhizae to your tea, this way you also provide beneficial fungi to the roots, improving root growth even more.

6. Bacterial vs Fungal Teas

When brewing a compost tea you have two decisions when it comes to the kind of tea you want, those options are bacterial or fungal. There is one that is better for the cannabis garden and that is a bacterial tea. While all plants require fungi and bacteria to thrive most plants require different proportions and not every plant can be treated the same.

For example trees, shrubs, perennials, and most long-lasting plants prefer to have fungal dominant teas. Flowers and vegetables will do better with bacterial teas and since cannabis is a fruiting plant bacterial teas will work best for them as well.

How Can I Avoid Brewing a Fungal Tea?

Luckily for us, teas that are significantly dominant in fungi are actually a lot harder to brew, requiring more specific conditions like needing a source of carbohydrates like oats. Also, fungi teas require a significantly longer process to brew taking anywhere up to a week. Bacterial compost teas should be done within 24 hours and a sure way to know that it's done is if it has a sweet and earthy smell to it. The smell can be described as a sweet tea that has been mixed with dirt on a rainy day.

7. How To Make Organic Compost Teas Step-By-Step

Once you have everything you need, it's super easy to brew teas, so here are 5 simple steps to guide you and keep your cannabis healthy and happy! You'll need:

• Bucket
• Airstone
• Air pump
• Mesh bag

Step 1

First of all, in most cities the water contains chlorine and it can kill the microorganisms so depending on your water source, you should leave the water under direct sunlight or leave it oxygenating for 48hs before brewing your tea.

Step 2

Before brewing your tea, you need to figure out when you'll be using it, teas take 24-36hs to brew, you don't want to brew your tea for too long because as the microorganisms develop, they may run out of oxygen or space and will begin to die.

Organic tea brewed up and ready to be used.

Only start the process if you will be using it within the next 36hs after brewing it, so for example,  if you're using it as a foliar spray, time your tea brewing so you can apply it when the lights are off or your cannabis plants are not getting direct sunlight.

Step 3

After dechlorinating the water, you need to check and adjust the pH which should be between 6.0-7.0 (it should be the same as your soil), and you need to calculate how much tea you'll need, based on that you'll know the size of the bucket you need.

Once you have your bucket, you need to have the air pump connected to the air stone, the air pump and the air stone will oxygenate the tea so the microorganisms can breathe. Also, you'll need a 400-micron mesh bag to place the ingredients in but it's not necessary, you can substitute it with a clean pair of pantyhose.

How to make a compost tea for cannabis.

Step 4

Now that you have everything ready, you can fill your bucket with water, then dilute the molasses straight into the water, place the ingredients in the mesh bag, put the airstones in the water, and start brewing.  Now, to know exactly how long it takes, you need to know the temperature of the water you're using so here's a table to help you.

Water temperature	Brewing time
10°C	72 hs
15°C	48hs
20°C	24hs
25°C	24hs

Also, have in mind that you should remove the mesh bag after 23hs of brewing, so if your water is at 10°C, you should remove the mesh bag after the first 24hs and continue brewing for the remaining 48hs. After you've finished brewing, your tea is ready to use so read along to know exactly how to use it.

8. How To Apply Compost Tea

So, organic teas can be used at full strength or diluted anywhere between a 1:20 ratio, this means the minimum amount you should use is 100ml per 2L of water. You can apply the tea to the roots (by watering) or as a foliar spray, so depending on how you're going to use it, you should dilute; Just have in mind that you don't have to dilute it and organic teas won't cause nutrient burn but by diluting it you avoid wasting precious tea.

How to use marijuana compost teas.

There's no such thing as a compost tea feeding schedule, but luckily, organic teas won't overfeed your cannabis plants so you can use them anytime you think your plants are hungry or when you want to boost microbial life in the soil. Don't throw away the compost and nutrition that you brewed the tea with. You can take the compost out of the teabag top dress it on your plants so you don't have to waste anything.

9. Can I Use Compost teas in Combination With Synthetic Nutrients?

There are so many growers who have not tapped into the amazing benefits of organics. They think they have to make a choice between synthetics or organics but this couldn't be any further from the truth, you can totally do both! It's called growing synergically. Microbes could potentially help synthetic growers more than organic growers because the microbes inside of a compost tea will act as a pJ buffer. Having a large and consistent microbial population will allow you to feed your plants with a much wider PH range. There have been many growers that don't even need a ph pen anymore after starting the application of compost teas. As long as your watering pH is from 5.8-7.5 the microbes will have no issue with that and they will continue to absorb nutrition.

You also don't have to worry at all about microbes dying off from synthetic fertilizer because there is such a large volume inside the compost tea that the fertilizer will have little to no effect on the health of the population.

10. In Conclusion

Compost teas for weed are one of the best ways to improve organically grown cannabis, they're usually used as a boost when you see your soil is running out of nutrients or you just want to take care of your soil, this is a simple and effective method that should be tried by everyone growing organically. Remember that compost teas also feed the beneficial microorganisms in the substrate so you have to avoid using chemical products to provide the best possible environment for the microorganisms to reproduce. Also, have in mind that the microorganisms are living beings so you also need to maintain good growing conditions in order for them to live.

As mentioned, these microorganisms that you have to take care of are beneficial, not to be confused with microorganisms that can harm your cannabis plants, both of them are microorganisms but beneficial microorganisms can have a symbiotic relationship with your cannabis, improving water and nutrient absorption while the harmful microorganisms can infect your cannabis plants with pathogens and diseases.

These harmful microorganisms can also attack the beneficial ones and take over the substrate so make sure the conditions are on point and that the beneficial microorganisms are healthy and well-fed to be able to fight back if harmful microorganisms try to get into your grow tent. It's also a good idea to add microorganisms every 7-10 days to keep your substrate healthy, so make sure you add more often and always check for bugs to avoid having problems along your grow cycle.

If you have experience with compost teas and growing organically, please share your tips and tricks with fellow growers, leave a comment in the comment section below!

This post was most recently updated on February 21, 2022.

External References

1. Composting parameters and compost quality: a literature review. - Azim, K & Soudi, Brahim & Boukhari, S & Périssol, Claude & Roussos, S & Thami-Alami, Imane. (2020).
2. Recycling of Organic Wastes through Composting: Process Performance and Compost Application in Agriculture. Agronomy. - Sayara, Tahseen & Basheer-Salimia, Rezq & Hawamde, Fatina & Sánchez, Antoni. (2020).

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