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Best Soil for Cannabis

Coast of Maine – Platinum Grower’s Mix, Super Soil

FoxFarm Happy Frog Potting Soil

Fox Farm Ocean Forest Potting Soil Mix

Cannabis, like all other plants, thrives from an ample supply of water, oxygen, and nutrients. These three base components are responsible for your crops’ overall health, growth rate, and final yield.

Of these three factors, soil composition is one of the most easily modified to suit the needs of cannabis crops. Due to this, cannabis-specific soil mixtures are a booming industry.

Although the nutrients themselves aren’t altered, they are added in specific amounts that promote healthy growth for cannabis plants. Without these pre-made soil mixes, cultivators would be left to compose their own.

The main question is: what’s the best soil for growing cannabis?

Pre-made cannabis potting mixes allow beginners and professionals alike to jump into the fast lane for growing marijuana plants. You’ll find everything your plants need in these soil mixes, such as beneficial bacteria, fungi, macronutrients, micronutrients, vitamins, and more.

Furthermore, cannabis-specific soil mixes provide a more natural form of growth, as compared to the hyper-accelerated growth of hydroponics or aeroponics.

We’ve sifted through countless soil brands to find you the best soil for growing cannabis. Whether you’re searching for an organic solution or an all-in-one soil mix – we’ve got your plants covered so they can grow on cruise control.

Coast of Maine – Platinum Grower’s Mix, Super Soil

FoxFarm Happy Frog Potting Soil

Fox Farm Ocean Forest Potting Soil Mix

Big Rootz All Purpose Potting Soil

Organic Super Soil Concentrated Strength

Super Soil Autoflower Concentrate

Purple Cow IndiCanja Organic Living Soil

Canna Terra Professional Soil Mix

Coast of Maine – Platinum Grower’s Mix, Super Soil

Coast of Maine is a boutique soil mix brand. Their Platinum Grower’s Mix is intended for growers that don’t want to spend additional money on pH monitors and associated products.

Coast of Maine’s Platinum Grower’s Mix is a stand-alone organic soil mixture that contains mycorrhizae, kelp meal, fishbone meal, lobster compost, alfalfa meal, and worm castings. This organic soil mix is jam-packed with everything your plants need to thrive.

However, all of these high-quality ingredients come in at a hefty price. If you’re willing to stomach the bill, you’ll find a hearty harvest of aromatic and cannabinoid-rich flowers come harvest time.

Although Coast of Maine’s Platinum Grower’s Mix is expensive, it performs exceptionally well. This is one of the best soil mixes for cannabis we’ve seen, and it’s highly suitable for both beginners and professionals alike.

    High-quality organic ingredients No need to pH adjust No supplements needed Grows cannabis plants from seedling to harvest
    Doesn’t contain perlite for optimal drainage One of the most expensive brands on the market May contain fungus gnats

FoxFarm Happy Frog Potting Soil

Fox Farm’s Happy Frog Potting Soil is one of the best and highly rated organic soil for cannabis plants. It’s perfect for seedlings and young plants because It contains mycorrhizal fungi and other beneficial microbes.

The nutrient source of Happy Frog stems from bat guano, earthworm castings, and forest products, such as wood chips. There are enough nutrients to last an entire cycle, from seedling to harvest.

Fox Farm didn’t overdo the nutrient content for a very specific reason, which was not to burn your plants. Many other soil brands create “hot” soil mixes by placing an overly-high nutrient content, but this is not the case with Fox Farm’s Happy Frog Potting Mix.

This is one of the best potting soil mixes for cannabis, especially for beginners. This is also the best soil for cannabis seedlings because they don’t require a high level of nutrients. If you’ve been looking for a gentle cannabis-specific nutrient mix – this is it.

    An ideal composition that doesn’t drain too fast Perfect soil for seedlings to mature cannabis plants Comes loaded with worm castings and soil microbes Insect free
    Doesn’t provide enough P & K for the flowering phase Contains a large number of wood chips Similar to standard garden soil mixes

Fox Farm Ocean Forest Potting Soil Mix

Fox Farm’s Ocean Forest Potting Soil Mix is a tried-and-true soil mix for much of the cannabis community. It’s one of the easiest soil mixes to use for all stages of plant growth, whether from seedling to harvest.

A massive benefit for Ocean Forest is the fact that it’s already set to the ideal pH range. 6.3 to 6.8 pH is the ideal range for plants growing in soil for nutrient uptake. This makes Ocean Forest incredibly efficient, and your cannabis plants will likely show it with vigorous growth.

Fox Farm’s went above and beyond by offering a two-pack, which enables cultivators with additional potting soil. However, the price comes to $30 per bag, which is still on the high-end for an organic potting mix.

Although you’ll spend a substantial amount of money for Fox Farm’s Ocean Forest, it will pay for itself, considering you won’t need a pH pen. If you’re looking for an easy-to-use potting soil mix – this is it.

    Simple to use soil mix Two-for-one deal saves money in the long run pH adjusted Ideal soil mix for seedlings to mature plants
    Expensive if only growing a couple plants Not enough perlite for aeration May require supplemental nutrients for the flowering phase

Big Rootz All Purpose Potting Soil

When it comes to the best cannabis nutrients for soil, Big Roots falls short. Although the product claims to be built by growers for growers, this potting mix doesn’t appear to stand out.

Their ingredient list, lists pre-washed coco-coir, peat moss, and compost as their base materials. Coco-coir and peat moss are both inert substances, which also lead to pH swings within the soil. If the only food source is compost, then it’s likely that you’ll need to supplement your cannabis plants during the flowering phase.

Furthermore, pests, such as fungus gnats, may find the perfect environment in Big Rootz’ soil bag. Through the humidity of the soil or due to the compost, various pests have been found within this soil mix.

Lastly, the price is double (or triple in some instances) that of competing products. Considering a bulk of the ingredients are technically inert, you’re paying for only a fraction of actual plant food.

If you’re looking for the best soil mix for cannabis, you’ll likely find it elsewhere.

    Formulated with mycorrhizae for enhanced root growth Contains water-retaining peat Contains pre-washed coco-coir to reduce nutrient lockout Easy-to-use out of the bag
    Very expensive Possibility of pests in the soil It’s necessary to pH your water

Organic Super Soil Concentrated Strength

The Organic Super Soil Concentrated Strength is formulated to create the perfect growing environment for your cannabis plants. They contain a wide variety of beneficial microorganisms and organic nutrients, all of which work synergistically to provide rapid growth and bountiful yields.

Although Organic Super Soil Concentrated Strength is one of the best organic soils for cannabis, it’s still relatively expensive compared to other products with similar ingredients.

A single bag will not fill an entire 5-gallon pot, which makes this an expensive product if you’re growing more than one cannabis plant. Although the instructions recommend cutting this product with a standard potting mix, it won’t last very long.

Furthermore, the Organic Super Soil Concentrated Strength has a strong odor, which is a significant downside if you must be discreet.

Although Organic Super Soil Concentrated Strength is a premier potting mix for cannabis plants, it’s not recommended if you grow more than a handful of plants at once.

    Organic Contains a wide range of beneficial microorganisms Simple to use Perfect for all stages of growth
    Very expensive for its small size Will not fill a single 5-gallon pot May contain pests

Super Soil Autoflower Concentrate

Here we have a fantastic but pricey soil in the Organic Super Soil Autoflower Concentrate mix, which is a specially formulated version of the original “organic super soil”.

What makes Natures Living Soil so good is the microorganisms they include, everything from Glomus Aggregatum, Glomus Etunicatum, Glomus Intraradices, Glomus Mosseae, Pisolithus Tinctorius, Scleroderma Cepa, Scleroderma Citrinum, Trichoderma Harzianum and so much more!

This enables the cannabis cultivator to take their plants all the way from seed, straight through to harvest.

Natures Living Soil as always deliver a great organic Autoflower mix with some fantastic ingredients:

  • Organic Earthworm Castings
  • Azomite
  • Epsom Salt
  • Coconut Water Powder
  • Aloe Vera The Microorganisms
  • High Quality Bat Guano
  • Blood Meal, Bone Meal
  • Fish Bone Meal, Alfalfa Meal
  • Kelp Meal
  • Dolomite Lime

Yes, the Super Soil Autoflower Concentrate is expensive, and the quantities may not be the best, but when you’re after a premium autoflower soil and can stomach paying that little bit extra, then Natures Living Soil is always a safe bet.

    All-In-One Top Rated Established Soil Brand
    Price Could be Better

Purple Cow IndiCanja Organic Living Soil

Purple Cow IndiCanja is the new kid on block in terms of cannabis soil. They produce a whole host of different organic products, including seed starter mix, BIOActive vegetable Supercharger, right up to their Purple Cow IndiCanja Organic Soil.

This plant-based, natural organic soil mix contains the necessary minerals and nutrients to start your seedlings on their journey. Having been scientifically formulated and tested Purple Cow IndiCanja is lauded by the people at IndiCanja as good for all stages of plant growth, from young seedlings all the way through to flowering.

IndiCanja bills their soil as developed by growers, for growers as well as being ideal for beginners or pro’s, an all-in-one soil perfect for every stage of growth.

We already know about the qualities of someone like FoxFarm Soil, but the big question is, is there room for another organic soil? And ultimately does the Purple Cow IndiCanja have what it takes to sit among the top manufacturers?

Whilst a small number of consumers have experienced fungus gnats, the top-rated reviews from users so far would suggest they do, but the proof is in the pudding, or should we say the harvest…

    Certified by the Organic Materials Review Institute All-in-one Super Soil Good for Different Stages
    Expensive Some Bags May Be Infested With Fungus Gnats

Canna Terra Professional Soil Mix

CANNA Terra Professional soil is probably better known to cultivators that reside in the UK, as it’s not widely available in the USA or Canada.

This nitrogen-rich potting mix is not only highly rated but also very reasonably priced. With thousands of happy customers across the UK, Canna Terra has been in the soil business for a long time and knows it like the back of their hand. They make everything from potting soil to nutrients for plant cultivation.

What makes CANNA Terra Professional potting mix different from your everyday soil is the organic rich ingredients. Sphagnum moss peat, compost, worm castings, perlite, and a special ‘natural plant booster’ to name a few.

Canna Terra bills their potting mix as the ideal soil mix for indoor and outdoor cultivation.

The high value organic ingredients CANNA Terra uses such as airy peat moss helps to prevent diseases and promote exceptional root development whilst delivering formations of thicker stems and higher yields. Low sickness rates and faster metabolism helps to ensure increased production.

Because of the above characteristics, CANNA Terra Professional Soil Mix is preferred by many UK growers for growing a wide variety of plants.

CANNA Terra Professional Mix makes an excellent bed improver that delivers a complex water/air system ideal for virtually every form of cultivation.

    Highly Rated Great Price Popular in UK Cultivation Well-known Established Brand
    Availability Purchase from official store and look out for infestations

Best Soil for Cannabis: Buyers Guide

Buying soil for your cannabis plants might not seem important, but it’s one of the biggest deciding factors when it comes to plant health and overall yield.

Cannabis plants take anywhere from 4-6 months from seed to harvest. Clones may take upwards of 3 months to complete their life cycle. Not only is this a significant investment in time, but also the energy needed to fuel their growth.

This is why we’ve compiled this buyer’s guide to help you find the best potting soil mix for cannabis plants.

The Number of Plants

Before you give your hard-earned money away, how many cannabis plants will you grow? This is the first question you must ask yourself because it’ll paint a clear picture of how much soil you’ll need.

If you’re growing a single plant or 6-plants in small containers, you won’t require a bale of soil to fit your needs. Instead, you can get away with purchasing a single bag to keep your costs to a minimum.

However, if you’re growing multiple plants in large containers, then you’ll need to purchase multiple bags or a large bale-size bag of soil.

Whether you’re growing a warehouse full of cannabis plants or a single plant in your closet, knowing how much soil you need is the very first step you must take.

Stand-Alone or Supplement-Based?

This is the next important factor that you must consider. Do you want a soil mix that’s filled with all the necessary nutrition for your plants, or are you seeking a mild soil mix that can be amended with additional supplements?

If you choose a stand-alone potting soil product, then it might not be suitable for seedlings due to the overall strength. If you decide to go with a milder soil mix, then you’ll need to purchase additional nutrients.

Some growers find more freedom in purchasing soil mixes that contain fewer nutrients so they can fine-tune their overall overall nutrient content.

However, this method is only recommended for cultivators with experience. If you’re a beginner, fine-tuning your soil mix may prove to do more harm than good.

Beginners will benefit from utilizing a stand-alone soil mix for cannabis because it contains everything your crop needs to thrive from seed to harvest.

Although these products are not packed to the brim with nutrients, they will allow you to grow vigorous and high-yielding crops without the worry of nutrient burn.

Organic or Inorganic?

This is another essential question you need to ask yourself. Organic soil mixes contain ingredients that are from organic sources, which is scientifically proven to be better for the environment and your overall well-being.

Inorganic potting mixes tend to be cheaper in cost, but the price difference isn’t as large as in the past. Ultimately, this is a very personal question that only you can answer.

Living Soil Or Not?

Next, you’ll need to understand if you’re looking for a soil mix that contains beneficial microbes or not.

You may question this idea at first, but fungi (mycorrhizae) and bacteria play an integral role in breaking down nutrients for your prized cannabis plants.

In other words, beneficial microbes facilitate enhanced nutrient absorption, promote root growth, and provides a protective barrier against harmful bacteria and fungi.

Although you’ll likely see an increased price tag on soil mixes that contain beneficial microbes, it’s well worth it when you consider the effort it takes to grow high-quality cannabis flowers.

Is Growing in Soil Easy?

This is the main question that beginners ask. In fact, growing cannabis in soil is one of the easiest methods because it’s by far the most natural.

The vast majority of soil brands offer “plug-and-play” soil mixes. This means that you don’t need to do anything – except water them.

In these cases, you’ll need to look for soil brands that are already within the optimal pH range. By finding a pH balanced soil mix, you won’t need to worry about complicating matters with a pH pen.

Do You Need Additional Aeration?

Just like animals, your cannabis plants rely on oxygen to thrive. Alongside water and nutrients, air is a necessity when growing cannabis plants in soil.

Perlite is a primary material that cannabis growers use to increase the amount of air inside a soil mix. Not all soil brands contain perlite, so it’s essential to understand if your soil mix is too heavy.

Air pockets within your soil mix not only provide oxygen for the roots, but they also allow the root system to expand rapidly.

Furthermore, consistent air pockets within the potting mix enhance drainage, which will reduce the possibility of fungus and bacterial rot.

How To Grow Cannabis in Soil

Growing cannabis in soil is incredibly straightforward, especially when it’s already pH adjusted. Here are a few tips on getting your soil ready for your marijuana plants.

The first thing you need to do is fill your container 3/4 full with potting soil. Gently place your plant, and carefully add additional soil to cover the roots.

The cardinal rule is never compact the soil. Cannabis roots not only thrive from the nutrients within the soil mix, but also from the air pockets.

These tiny pores keep roots from rotting, so it’s essential that you refrain from pressing down on your soil mix.

If your soil mix is already pH adjusted, then you simply add water. Always allow your plant to satisfy its thirst before adding more water to avoid overwatering symptoms.

CLICK HERE >>> to read our fantastic 2020 Round-up Review & Guide of the Top 8 Best Soil for Cannabis | The Highest Crop

What is Good Soil For Growing Cannabis?

When it comes to growing cannabis in soil, unless you’re using a brand that is known for making soil that is specifically cannabis-friendly, there are a few things that you need to consider before starting a grow.

What should you look for in good cannabis soil?

I think most growers agree a good cannabis soil should look dark and rich, with a loose texture that drains well and can hold water without getting muddy (you want wet soil, not dirt-batter!). But beyond that, what do you look for?

The following video shows the soil texture you want (this is Coco Loco, an excellent soil for growing cannabis)

Some growers choose an amended and composted “hot” soil that slowly releases nutrients over time. With this type of soil, you typically just add water or natural supplements like worm tea from seed to harvest. Other growers prefer a lighter potting mix so they have more control, and give nutrients in the water once the plant roots have used up the nutrients in the soil. But which brands can you trust?

Some popular soil examples that I’ve used with good results include:

  • Almost any organic soil potting mix – If you can’t order special soil online, ask for the best soil at your local gardening store. You can use almost any organic soil potting mix to grow cannabis. I say “organic” because that cuts out a lot of potentially problematic ingredients like slow-release chemical nutrients (which often cause nutrient issues in the flowering stage by delivering too much Nitrogen). If asked what you’re using it for, say tomatoes. You should plan to start adding extra nutrients in the water by the time a plant is a few weeks old as the roots will quickly use up everything. Try to look for soil with a rich and dark but loose texture. It’s a good sign if you see little white pebbles mixed in (this is perlite, which makes soil drain better). If a soil looks like dirt or mud, it’s no good!
  • Roots Organics Original – This was the first soil mix I ever used to grow cannabis and I had a great experience. I’ve moved on to Fox Farm products because they were available at my local hydroponics store, and now I’m hooked on Coco Loco. But Roots Organics Original soil has been around for a while because it works great. As with most soil mixes, you will need to supplement plants with additional nutrients after a few weeks.
  • Fox Farm Happy Frog soil– This soil mix is relatively light on nutrients so it’s great for seedlings. It’s also suitable if you plan to give nutrients in the water from seed to harvest. If you don’t add extra nutrients, your plants will use everything in the soil up quickly.
  • Fox Farm Coco Loco soil– A coco-based soil mix with enough nutrients to last your plants for a few weeks. With Coco Loco, you should start supplementing with extra nutrients once plants are 2-3 weeks old. I personally like Coco Loco the best of any soil mix I’ve used. You can use it by itself and it’s also my favorite base potting mix for a “just add water” super soil grow. I feel like plants tend to grow happy and healthy while being more resistant to over or under-watering compared to the other soil mixes I’ve tried. It’s great soil for other types of crops too.
  • Fox Farm Ocean Forest soil– A “hot” soil mix with lots of nutrients packed inside. You can start seedlings directly in this mix though they may show signs of nutrient burn at first until they get adjusted. Ocean Forest has enough nutrients to last your plants quite a while, though you likely should still give extra flowering nutrients once your plants start making buds in order to get the best yields, density, and bud quality. Cannabis plants need a surprisingly lot of nutrients in the flowering stage and you don’t want to starve the plants right as buds are forming.

Recommended soil nutrients:

  • Fox Farm Soil trio – These 3 bottles include everything your plants need from seed to harvest. The FF trio produces superb weed with any high-quality soil.
  • Learn about other cannabis-friendly nutrients

Important Cannabis Soil Considerations

  • Texture
  • Drainage Ability
  • Water Retention

Although that list looks vague and complicated at the same time, the requirements you want to meet are actually pretty simple; let me break it down!

Texture, Drainage & Water Retention

It’s easy to get caught up thinking about what nutrients and amendments are in the soil, and those are important, but perhaps the most important aspect of any soil is actually its texture, ability to drain, and overall water “holding” ability.

In order for a cannabis plant to grow and thrive, it needs a good mix of both water and oxygen at the roots at all times! Too much water and the plant roots can’t get enough oxygen (lack of oxygen at the roots is why plants get droopy from overwatering) but on the flip side if there’s not enough water retention the roots can be injured from drying out too quickly!

What gets the best results for growing cannabis is a soil with a light texture that is good at retaining water…but not too much!

Note: Don’t worry, there’ll be examples of good and bad soil in just a bit!

Signs of Good Cannabis Soil

  • Appears dark and rich
  • Loose texture
  • Drains well (doesn’t make a pool on top of your soil for more than a couple of seconds and doesn’t take forever to drain out the bottom)
  • Holds water without getting muddy (you want wet soil, not dirt-batter)

Example of “Good” Cannabis Soil Ingredients

  • Composted forest humus
  • Sandy loam
  • Sphagnum peat moss
  • Coco coir (sometimes labeled coco fiber)
  • Perlite
  • Earthworm castings
  • Bat guano
  • Fish meal
  • Crab meal
  • Bone meal
  • Blood meal
  • Azomite
  • Pumice
  • Kelp
  • Dolomite lime
  • Greensand
  • Mycorrhizae
  • Leonardite

Note: You’ll likely never see any soil mix with ALL those ingredients, but I wanted to share examples of common cannabis-friendly ingredients and amendments that often appear on the label of good soil 🙂

If you get the soil part right, you have almost everything you need to get to harvest! With the correct texture, drainage and water retention, you’ve got a perfect base. Add good soil cannabis nutrients, especially in the budding phase, and you should get to harvest with great results!

Example of happy marijuana plants in good soil!

More About Common Amendments to Alter Texture, Drainage & Water Retention of Soil

Perlite

  • Perlite is one of the most common soil amendments. It is highly recommended for any soil mix that doesn’t have some already.
  • Very light, airy white “rocks” that feel almost like popcorn and add oxygen while increasing overall drainage ability.
  • Add perlite to the mix (10-40% of the total volume). Use less perlite if you want better water retention and don’t plan on using a lot of extra nutrients. This is because a lot of extra perlite can cause the nutrients leach out faster from the soil. Add higher levels of perlite if you want to use a lot of added nutrients or supplements without burning your plants (since perlite helps prevent nutrient buildup).

Vermiculite

  • Vermiculite “lightens up” heavy soil and improves water retention.
  • Some growers use perlite and vermiculite interchangeably, though they’re not exactly the same. Vermiculite holds water much better than perlite, but is not as effective at adding aeration and drainage.
  • Some growers use a little bit of both. If you go high with vermiculite, you don’t want to go as high with perlite and vice versa. Together, perlite and vermiculite should never make up more than 50% of your soil!

Coco Coir

  • Coco coir is made from coconut husks. It can be purchased as loose coco coir, in an amended potting mix, or as coco bricks which needs to be rehydrated before use (learn how to re-hydrate coco bricks). Sometimes you’ll find a “soil” mix that is pretty much all coco plus amendments, and these can be a great choice for cannabis. Coco has some unique properties that make it a good supplement for cannabis soil mixtures.
  • Coco improves water retention, but doesn’t make soil heavy.
  • Roots tend to develop faster and plants are less likely to suffer from overwatering in coco coir.
  • Some growers grow in pure coco, but if you’re adding it to a soil mix as an amendment, you might add 10-30% coco coir.

Worm Castings

  • Worm castings is a nice way of saying worm poop, and cannabis plants love it!
  • Improves texture, drainage and moisture retention
  • Add a natural source of nutrients that breaks down slowly
  • Usually contains high levels of beneficial micro-organisms due to going through a worm’s digestive system 🙂
  • Add up to 30% worm castings in your soil (although it contains nutrients, it’s gentle enough that it’s unlikely to burn your plants even if you add too much)

Now here are a few examples of good and bad cannabis soil so you can see the texture you’re looking for!

Good Cannabis Soil
Rich and light composted soil. Since this soil doesn’t have a lot of perlite, it’s a good choice for a grower who doesn’t want to add a lot of extra nutrients or supplements in the water.

Good Cannabis Soil
Another light, rich soil mix with great drainage. Although there is a wood chip in this picture, for the most part the mix is completely composted and broken down. It’s normal to see some wood pieces in composted soil, but you don’t want to have to wait for a lot of wood to break down while your plants are growing – you want all that rich nutrient goodness to be readily available to your plant roots 🙂

Good Cannabis Soil
This soil has quite a bit of perlite, which is a good choice if you plan to feed heavily with nutrients and supplements since the extra perlite prevents nutrient buildup in the soil

Good Cannabis Soil
The plant is growing in organic, composted “super soil” which has enough amendments to last your entire grow, so the only thing you do is add water!

Here’s organic “super” soil up close

Bad Cannabis Soil
This soil is muddy, clumpy and waterlogged. It retains too much moisture, which makes it really easy to overwater your plants.

Bad Cannabis Soil
Cannabis soil should not have a whole lot of big visible wood chips in it. That means the soil hasn’t been fully composted, and all the nutrients and goodness in that wood is mostly unavailable to your plants.

Bad Cannabis Soil
Although this seedling is over a month old, it has stayed tiny. Its growth is stunted by the thick heavy soil that holds way too much water and not enough air. Note how some of the soil looks like one solid object.

Bad Cannabis Soil
Don’t use dirt from outside! It almost never works, especially if it looks like this!

Suggested Brands for Cannabis Soil

Fox Farm Ocean Forest Soil

Fox Farm has been around for over 30 years and makes some of the most common types of “cannabis soil” (at least in the US). They have several great soil mixes, including “Happy Frog” which is a great choice for seedlings and clones.

Their Ocean Forest soil mix is “hotter” soil (higher levels of nutrients) that contains ingredients that cannabis plants love, including earthworm castings, bat guano, fish meal and crab meal. The nutrients contained in the soil will provide everything your plant needs for several weeks. Although it might give young seedlings just a touch of nutrient burn at first, they can be started in Ocean Forest soil and will soon be able to use the nutrients and start growing quickly. Some growers might put a little big of Happy Frog on top of a container of Ocean Forest, just to make it a little more gentle for seedlings the first week or two.

If you are willing to keep transplanting to bigger pots as your plant uses up the nutrients in the soil, you don’t need to supplement with extra nutrients. However, even if you grow in the same pot from seed to harvest, Fox Farm offers a complete nutrient system that is also formulated for plants like cannabis and goes perfectly with their soil to make sure your plant is getting the right levels of nutrients throughout its life.

This plant is growing in Fox Farm Ocean Forest Soil

Kind “Super” Soil (Living Soil)

When cannabis growers talk about “super” soil, they’re usually referring to soil that has been amended with slow-releasing organic nutrient sources, and then composted for several months (learn more about super soil).

The composting process creates a “living” soil that is full of microorganisms in the rhizosphere (area around the roots). Properly composted soil has nutrient sources that slowly break down over the course of your plant’s lifecycle. It very closely mimics what happens in nature.

Super Soil has a colony of micro-organisms living in the soil which form a symbiotic relationship with your plant roots. They deliver nutrients to your plant, and in return they eat the sugars that get secreted by your roots!

The “micro-herd” in the soil delivers nutrients directly to your plants. As long as you’re using decent water, you usually don’t need to worry about pH or other things that can disrupt nutrient absorption in regular soil.

However, when growing with Super Soil, it’s a good idea to avoid watering too much at a time, as extra runoff waterwill drain away some of the nutrinets. Try to give just enough water to saturate the soil with very little extra coming out the bottom. Since you won’t be adding more nutrients through the grow, you want to conserve what’s in the soil!

Nugbuckets is a famous organic soil grower! Check out his plants!

Organic Potting Mix

This is what kind of soil to get if you don’t have any “good” soil available, but want something that is known to work for growing cannabis.

Generally, anything labeled as an “organic potting mix” will work. This type of mix hasn’t been amended with chemical slow-release nutrients, which is one of the main things you want to avoid with soil for cannabis. I know it sounds like heresy, but even the Miracle-Gro version of “organic potting mix” will work okay, because unlike their original potting mix it doesn’t contain chemical nutrients (though it still has poor drainage and moisture retention – almost any other type of organic potting mix is better!).

Usually an organic potting mix does not have enough nutrients to last your plants for more than a few weeks, so it’s a good idea to always supplement with cannabis-friendly nutrients, especially in the flowering stage when your plant is making buds and needs lots of extra Phosphorus and Potassium.

Espona Organic Potting Mix is found in many stores in the US, and works for growing cannabis!

What to Watch Out For With Any Soil Mix At the Store

  • Look At and Touch It If You Can! You already have an idea what soil should look and feel like, but here’s a test: If you form the soil into a ball, it should stick together loosely, but it should also easily fall apart again if you squeeze it.
  • No “Time Release” Chemical Nutrients in the Soil – These types of soil slowly release nutrients over the course of months, which provides too much Nitrogen in the flowering stage and could possibly impair overall bud growth.
  • Soil Should Appear Dark and Rich – Pale, crumbly or sandy soil usually doesn’t have a lot of nutrient content that the plant roots can get to.
  • Soil Has Little White Rocks In It (Perlite), if you see white, almost fluffy rocks dispersed through the soil like popcorn, that is usually a good sign because it means this potting mix was intended to have good drainage.
  • Soil Isn’t “Heavy” – Cannabis grows best in soil with a light airy texture and great drainage, which may seem almost fluffy when it’s dry.
  • Example of “Good” Soil Ingredients – Composted forest humus, sandy loam, sphagnum peat moss, coco coir (sometimes labeled coco fiber), perlite, earthworm castings, bat guano, fish meal, crab meal, bone meal, blood meal, Azomite, pumice, kelp, dolomite lime, mycorrhizae and leonardite. That’s not everything, just examples of cannabis-friendly ingredients you see the most often 🙂
  • Examples of “Bad” Soil Ingredients – You don’t want to see wood or bark on the label if it doesn’t say it’s been composted first. Also if you see just the word “fertilizer” in the ingredients that’s often code for slow-release chemical nutrients, which you don’t want!

Try to get soil that looks like this!

I hope this soil tutorial helps you find the right soil for your cannabis setup!

What is Good Soil For Growing Cannabis? When it comes to growing cannabis in soil, unless you’re using a brand that is known for making soil that is specifically cannabis-friendly, there are a