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2022-10-03 09:24:39

Cannabis DIY: Make Your Own Super Soil

Organic weed. The taste and flavour are like nothing else, and the potency is top-notch. Super Soil has been brought to the mainstream growing scene thanks to cultivators like Subcool.

I’m going to go out on a limb here and call him the Godfather of super soil. For nearly 30 years he’s been using this mixture to produce dank grows that are au-natural. While there is a DIY recipe down below, I suggest you take the time to read about what super soil is exactly, and a little bit more about the man who created this method.

There are prepackaged super soil mixes on the market, but nothing compares to taking the time to roll up your sleeves and make your own.

Alrighty, enough with the small talk, let’s get down to it!

What is Super Soil?

Super soil is an organic grow medium made by mixing certain ingredients.

When you use super soil, you’re taking a lot of the guesswork away and reduce the amount of plant science you need to rely on.

Putting nature in charge is what using super soil is all about. From planting to harvesting the only thing you’ll need to add is plain ‘ole water.

Sure, a hydroponic grow may be quicker and produce larger yields than soil, but the potency and quality of cannabis truly shines when you use an organic grow medium.

You don’t need to monitor Ph levels when using super soil because you’re not using chemical fertilizers to enhance your plants.

Who Created Super Soil?

Subcool is the name, and perfecting organic cannabis is the game.

For nearly 30 years this man has finetuned his recipe in an effort to perfect the super soil recipe.

Since its creation, several brands have made premixed versions and hundreds (maybe even thousands) of home-growers have put their spin on the super soil mixture.

He has tried every type of base mix (soil) under the sun, and while he prefers sourcing a local soil mixture like Roots Organic and Harvest Moon, he has also has success with commercial soil brands like Fox Farms (but he had to tweak them).

If you’re new to the super soil game, I highly suggest brushing up on Subcool’s super soil recipe as a starting point.

Cannabis DIY: Recipe to Make Your Own Super Soil

While there are tons of various super soil recipes, all of them are based on the same idea: providing every nutrient needed for a successful grow cycle organically.

If you’ve done your research on the cannabis variety you’re growing, you’ll know the nutrient habits, which will make choosing the right ingredients easier.

The recipe below is quite popular and based on the OG super soil methods of Subcool’s successes (and failures).

This recipe should make around 10 batches if you’re using 7 gallon pots (the most common size).

Pro tip: Fill your plant pots halfway. No more, no less.


  • 875lbs of premium organic potting soil
  • 63lbs of worm castings (worm poop)
  • 2.7 lbs. fishbone meal
  • 2.7 lbs. bone meal
  • 5 lbs. blood meal
  • 5 lbs. bat poop (guano) high phosphorus
  • 709 ml. alfalfa meal
  • 709 ml. kelp meal
  • 709 ml. oyster shell
  • 235 ml. agricultural lime
  • 475 ml. azomite
  • 2 tbsp. humic acid
  • 2 tbsp. mycorrhizae


Mix all of the above ingredients together and add a little bit of water until lightly moist. After micing, place your soil into covered containers or cover with a tarp. Let the mixture sit for a minimum of 40 days or up to 90 days (allowing your soil time to compost naturally).

Once your super soil is composted, fill your plant pots halfway with your mixture adding a little bit of base soil on top.

You may have to add compost tea here and there throughout your grow, otherwise, all you need to do is water your plants until harvest. It’s as simple as that!

Pros and Cons of Growing Cannabis With Super Soil


  • Micro and macronutrient rich soil means you are less reliant on chemical fertilizers
  • No need to flush your cannabis plants because there are no chemical fertilizers
  • All-natural approach to growing big and flavorful buds
  • No need to manage Ph levels
  • Super soil is environmentally friendly and sustainable
  • Growing organic cannabis is easier when you make your own super soil


  • It’s not recommended to plant clones, seeds, or seedling cannabis plants straight into super soil as it can cause nutrient burn
  • The initial upfront cost may be higher than purchasing traditional nutrient solutions
  • Making your own super soil takes time, so you have to be patient

Already Made Soil for Growing Cannabis

If you’re lacking time, you can pick up premade soil at most garden centers.

The only downside with this option is that it will more than likely cost you more money.

The benefit is that you will speed up the planting process with the same benefits as making your own DIY super soil.

Before choosing the best growing medium that suits your needs, figure out if you would rather save money or time.

Final Thoughts on Super Soil

You know that they say: you reap what you sow, right? Whoever they are, was probably talking about super soil.

Well, not really, but the saying definitely fits when we’re talking about making your own super soil.

The thing with super soil is that it works. When you put in the effort, your cannabis plants will reap the rewards.

Some say that there are flaws with creating your own super soil, like the fact you’re buying organic soil and adding essential nutrients, but that doesn’t mean your soil wont be rich with beneficial nutrients to help max out your yield.

If you can’t find organic soil where you live, taking the time to make your own might your best option.

Instead of mixing a bottle of nutrients, you’re creating your own nutrient-rich soil which will enhance the flavour and aroma of your buds.

About the author: Heather Burton

Heather lives with her husband and two children in beautiful British Columbia. Her passion has always been to enhance the lives of others by helping them reach their business goals.

Content management is her specialty, and writing is what she does best. Working specifically in the cannabis market, Heather strives to help dispensaries, patients, doctors, manufacturers and recreational users by giving them the voice they need. When she is not writing, you can find her anywhere outdoors and away from the screen.

Last Update 2022-10-03 09:24:39
Read 1302 Times
Published In Cannabis Cultivation