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how to use super soil for cannabis

What is Super Soil For Cannabis And How To Make It

December 1, 2022

If you’re a cannabis grower, the term super soil for cannabis may not be alien. What exactly is it?

Nitrogen, phosphorus, and potassium are essential components your marijuana crop requires from seed to harvest. A homemade growing medium may help you balance the nutrients for optimal yield and prevent a cannabis nutrient burn

Organic super soil has beneficial nutrients for weed cultivation throughout its growth cycle. You only need to add  water for the plants to thrive.

But how do you make the marijuana growing medium? 

super soil for cannabis

What is super soil for cannabis?

Super soil for cannabis it’s a nutrient-rich medium with all the components needed to grow weed. It’s organic and free from synthetic chemicals. It contains bioactive microorganisms useful in growing marijuana seeds, including feminized marijuana seeds.

Preparing cannabis super soil is easy and only requires a little technical knowledge. It’s also purchased in marijuana grow shops. 

Advantages and disadvantages of making your own cannabis super soil

While super soil has several benefits, it also has some downsides. Here are its pros and cons. 


  • Super soil is versatile in that it’s ideal for use indoors and outdoors.
  • The microorganisms in the soil ensure the plants don't suffer from pests and diseases.
  • Flushing the roots isn’t needed as it contains no synthetic chemicals.
  • It’s reported that using the medium with the right pH for cannabis results in a natural aroma, better taste, and high quality buds.


  • If you intend to buy super soil, it can be costly. If you’re growing cannabis on a large scale, learn how to make super soil.
  • It takes a long time to prepare super soil, usually needing a month to two to get it ready. Waiting this long can have an impact on your cannabis-growing business.
  • Marijuana grown with super soil has a slow growth cycle. The plant takes time to absorb the nutrients it needs. If you want a faster yield, autoflower seeds may help as they take up to seven weeks to mature. 

How to make super soil for growing cannabis

how to make super soil for cannabis

Super soil for cannabis has a recipe that ensures the plants get essential nutrients, including nitrogen, potassium, and phosphorus. 

Before embarking on making the growing medium, consider the following:

  • Quality of the soil will be the substrate's basis. Utilize affordable testing kits sold in garden shops. A visual check may also reveal any significant issues, e.g., if it’s too dry.
  • Ground preparation. Traces of previous plants, like roots, shouldn't be present before placing the super soil.

The following tools and ingredients are also needed.

  • A rake to help spread each layer of super soil ingredients
  • A mixing container
  • Tarp for holding the soil as it’s composting
  • Bone meal, worm castings, and bat guano can go a long way towards adding to the medium’s nutritional content.
  • Azomite
  • Dolomite

Once you have the items, use the following steps

  1. Spread soil on the tarp
  1. Add bone meal and mix it up with the soil.
  1. Add azomite and dolomite to the mixture. Then add another layer of soil on top.
  1. Add worm casting into the pile and put another layer of soil on top.
  1. Add the bat guano to the pile, then have another layer of soil on top of the mixture.
  1. Over the next week, mix the soil with the ingredients once daily.

Once you have acquired an even blend, you’re halfway there. Next, is the compost making process, which requires patience. Here’s how to go about it:

  1. Store the super soil mix in a tarp and close it up. The soil needs to retain its water content. A cultivator should ensure the soil isn’t too wet or too dry, just moist. A dry mixture will halt the composting process.
  1. Over the next two months, expose the covered soil to the sun. The heat, combined with the microorganisms, breaks down the nutrients. Add worms to the mixture to help in aeration. It’ll accelerate the process.
  1. After one or two months, your super soil for weed cultivation will be ready.
how to use super soil for cannabis

Using super soil for weed

After preparing the organic soil mix for cannabis , proceed to plant your seeds. Take into consideration that it’s nutrient-rich and using it exclusively may cause a nutrient burn on your weed. 

To avoid such issues, take the following steps.

  1. After making super soil, mix one portion with three of regular soil. Do this for every space where you plan to plant your weed seeds.
  1. The next step is to provide the right amount of water for your cannabis plant, every two to three days. One way of checking if your crops need water is by dipping your finger two inches into the soil. If wet, don't water, but if dry, hydrate them.
  1. Watch the weed plants grow through their phases until they bud.

During harvest, experience the ‘super’ in the soil. The cannabis plants offer decent yields and produce quality THC full buds.

It also saves money as it’s cheap to prepare. Super soil is also environmentally friendly. When preparing and cultivating weed using the soil, you don’t release any harmful chemicals into the environment.


Can I damage my weed plant with super soil?

No, you can’t. Super soil for weed allows for the natural growth of marijuana. The cannabis crops take nutrients from the medium, slowly picking the ones it needs and leaving out the rest. 

Is super soil good for autoflowers?

Super soil is suitable for all types of cannabis strains, including autoflowers. The best soil for autoflowers is organic and has diverse microbiomes. Their fast growth reputation allows for the gradual absorption of nutrients, enabling flowering without light in two to four weeks. 

Does super soil need nutrients?

No. Cannabis super soil is nutrient-rich organic soil, so no additional nutrients from external sources like fertilizers are needed. The soil derives its nutrients from microorganisms present in the organic soil.

About the Author: Kyle Kushman

Kyle Kushman is a legend in the cannabis community. He is the modern-day polymath of pot: cultivator, breeder, activist, writer, and educator. After winning no less than 13 Cannabis Cups, there’s nothing this guy doesn’t know about indoor growing - he’s been there, done it, and is still doing it to this day!

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