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Best Soil For Cannabis To Maximize And Boost Yields

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Agriculturist Musa

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Growing weed or cannabis does not mean that you plant your weed on any soil type. Instead, you will need to look for the best soil for cannabis for your weed to obtain the nutrients and minerals they require to thrive.

Before we review the buying guide for the best soil for cannabis, we prepared a listof the best soil for weed growers leading in the market that will make your indoor and outdoor farming for cannabis plants pleasurable and give you, at the same time, more yield.

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1. Coast of Maine CMSBO15 Stonington Blend Organic Growers Potting Soil

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This Coast of Maine is another potting soil that will make your cannabis plants grow and dance joyfully. If you don't intend to spend more money on pH sensors, this organic potting mix for marijuana plants is ideal. This is because this excellent cannabis soil may be used as a stand-alone soil mixture that contains all the ingredients your cannabis plants require.

A few elements are kelp meal, fish meal, lobster compost, worm castings, alfalfa meal, and mycorrhizal. However, having all of these essential components in this high-quality cannabis soil comes at a steep cost, literally. As a result, if you're prepared to pay the money for this best potting soil, you can rest assured that you're getting good soil.


  • Contains all the nutrients your cannabis plants need
  • No need to adjust or pH
  • Suitable for growing cannabis from seedling to harvest
  • Does not require you to add supplements


  • Highly-priced
  • Its drainage is not the best

2. Fox Farm Salamander Mix Potting Soil

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Fox Farm isn't the type of soil you want in your terrarium, despite the name. Instead, Fox Farm utilizes Salamander to emphasize its ability to store water. This soil stands out from the rest and is the best soil mix for healthy plant growth in terms of moisture retention.

You can get away with using the least amount of moisture possible using Fox Farm's Salamander Mix, which is a significant thing if you're running a big business. The disadvantage is that if you overwater, all of your plants will be more prone to root rot.

Again, if you have watered down to a science, it doesn't matter; however, if you grow weed for fun, you may not have it that precise. Although it is not beginner-friendly soil, it is less expensive and reduces the cost of watering your plants. This could be all you need to save money without losing product quality.


  • Holds moisture well
  • More affordable
  • Ideal or hot climate plants


  • May damage your cannabis plants if you over-water

3. Miracle Grow Potting Mix

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Miracle grows another o the best cannabis soils you will love if you need your cannabis plants to be healthy. The good thing about this potting soil mix is that you can use it for the indoor or outdoor cultivation of your cannabis.

Using this miracle potting mix is also easy, and no matter your level of experience, you can use it, and you won't make any mistakes; all you need to do is pay attention to the instruction.

This mix will provide your cannabis plants with a firm foundation and critical nutrients for their roots to ensure they grow healthy.


  • Easy to use
  • Suitable for young plants and old alike
  • Pocket-friendly
  • Retains moisture, hence does not require frequent watering
  • You can use it for indoor or outdoor cultivation


  • None

4. Dr. Earth Fertilizer and Soil Organic 8 Bud and Bloom Fertilizer

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Mother Earth Coco is a fantastic and potent soil to consider if you seek an alternative that allows your cannabis plants to flourish naturally. It's the greatest cannabis potting soil, and it does a fantastic job of promoting cannabis plant growth and flowering. Above all, it's a certified potting soil that many cannabis farmers rely on as a growing medium.

The beauty of Mother Earth Coco is that it is made entirely of natural coconut coir. It's a product with a lot of coconut fiber and no artificial ingredients. In addition, the soil contains components such as 30 percent perlite and 70% coco pith. These two components aid in the drainage and aeration of your cannabis plants.

Your cannabis plant can still grow swiftly with good aeration and drainage even if you don't water it now and then. In addition, because of the good drainage and aeration, your cannabis plant will receive more nutrients and minerals. Another great reason to use this organic potting soil is its high-cation exchange rate, excellent porosity, and texture.


  • Suitable for use indoors and outdoors
  • Lasts longer in containers
  • High water retention capabilities
  • Good drainage
  • Contains almost all nutrients


  • Can attract gnats

5. Organic Plant Magic Compressed Potting Soil

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If you want the best soil for cannabis to keep your plants healthy and nourished, try this organic potting soil that contains every essential nutrient, including trace minerals and soil microbes. These beneficial microorganisms give your garden a boost and ensure your plants are green and healthy.

This soil is compressed, expanding up to four times when adding water, which means you can use a little to grow more plants.

It is also organic and 100% natural, making it planet, kid, and pet friendly. So you do not have to worry about it causing harm to anyone.

This plant magic store is composed of mycorrhizae, worm castings, amino acids, humic acids, and other beneficial microbial life.


  • The soil expands when you add water
  • Pet and child safe as it is organic
  • Contains most nutrients, including warm castings
  • Great for all plant types


  • Unclear instructions

6. Fox Farm Ocean Forest 6.3-6.8 PH Plant Garden Potting Soil Mix

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Fox Farm Ocean Forest is the best soil for cannabis since it has a balanced ph of 6.3 to 6.8. In addition, it helps control different soil constituents concerning plant growth like soil bacteria, nutrient level, nutrient availability, toxic elements, and soil structure texture.

Ocean Forest Potting Soil mix is excellent for container farming and is available in a ready-to-use bag, making it easy for new cannabis growers. In addition, cannabis plants will not need nitrogen fertilizers because the soil mix has all the components needed for healthy and robust growth.

This ocean forest soil mix has a mixture of worm castings, bat guano, and fish meal which are 100% rich in organic humus and are water-soluble, enabling your plants to swiftly and efficiently absorb necessary nutrients and minerals.


  • Encourages powerful growth
  • Has natural fertilizers
  • Maintains proper density for healthy root growth
  • Ideal for containerized plantings
  • Well aerated and good drainage
  • Provides young cannabis plants nutrition for up to 30 days or more without additives


  • Contains larger pieces of organic material

7. Sun Gro SUGRBG2 13020402 Black Gold Natural and Organic Soil

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Having the best soil for cannabis does not necessarily mean that you will have to buy cannabis specialized for growing cannabis; you can also opt to get a purely organic soil mix. For example, Sungro's Black Gold is an all-organic potting soil that will do great for a basic cannabis soil recipe.

Black Gold claims to have every fundamental characteristic of healthy soil for growing cannabis. It has a blend of perlite and pumice in the loamy mix that helps develop microorganisms and is also great for hydration. In addition, the potting mix has balanced ph, worm castings, and Canadian sphagnum peat moss that will ensure that your cannabis seedlings are not burnt.

It is excellent for indoor or outdoor soil and has great reviews from general gardeners and cannabis growers. The ingredients used in this organic potting mix are environmentally friendly and stimulate earthworms and extra advantageous organisms to increase and enhance soil construction and fertility.


  • 100 percent organic
  • Has a blend of perlite and pumice to ensure excellent aeration
  • Organic potting soils rich, the loamy mix is an excellent choice for gardening
  • Has added fertilizer
  • Reliable and high-performance base soil for cannabis
  • Promotes accelerated growth for the Marijuana


  • A bit pricey

8. Big Rootz All Purpose Potting Soil

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Big Rootz is precisely formed to satisfy the demands of cannabis growers. It is an All-Purpose Soil that has rich ingredients for growing weed. The soil has good drainage, which allows the water to drain moderately without water pooling. It also has Good Water Retention, which grants water supply constantly to plants to enable continued germination and endurance.

The All-Purpose Potting Soil is great for indoor and outdoor growers, which means it can also be added to existing soil and is effective for growing cannabis. Big Rootz potting mix contains peat moss, coco coir, worm casting, Fish Bone Meal, Ligna Peat, blood meal, Pumice, Seabird Guano, Feather Meal, Kelp Meal, Green Sand, Bat Guano, and Clean Sourced Compost which are used to regulate the ph levels of the soil.

Although the soil is expensive compared to other organic potting mixes, it is considered the best soil for cannabis seedlings.


  • Supports improved root growth with mycorrhizae
  • Easy-to-use and straightforward out of the bag
  • It is an award-winning blend
  • Provides increased nutrients and water uptakes to foster overall plant vigor
  • Contains water-retaining peat
  • Has Proper Water Drainage and good Water Retention
  • Contains pre-washed coco-coir to reduce nutrient lockout


  • The pH levels of this soil can be too high

9. Roots Organics Rod Soil Original Potting Soil

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Roots Organics Rod Original Soil is a coco coir-based soil that comprises moss, pumice, and perlite. The perlite and coco coir are the primary ingredients to give the soil fast drainage. The soil mix is ready to use, and the best thing is that you can use the gal that comes with this cannabis soil. The soil mix comes with a 1.5 cubic bag and weighs around 30.8 pounds.

It is a good cannabis soil mix because it is designed with high-quality organic ingredients like bat guano, worm castings, bone meal, mycorrhizae, green sand, humic acid, soybean meal, among others. It encourages root development and guarantees oxygen relinquishes the roots for maximum growth and strength, promoting better yields.

This coco coir-based mix is the best soil for cannabis for professional and new growers because it improves the root biomass and helps container-grown cannabis combat stress.


  • Comes in a heavy-duty, ready-to-grow gal
  • Combined with the proper balances of perlite and pumice for superior drainage
  • Has a vigorous root system
  • Made with the highest quality organic ingredients
  • Coco coir fiber-based
  • Designed with a steady air to water ratio
  • Promotes excellent performance and heavy feeding


  • May contain bugs

10. FoxFarm FX14054 Happy Frog Potting Soil

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Happy Frog Potting Soil is mainly manufactured for container or vessel planting. However, the soil also has beneficial microbes, forest humus, fish meal, earth castings, bat guano, and worm castings that promote nutrient intake in the cannabis roots and regulate ph levels.

The cannabis soil is made explicitly for cannabis growers. The Happy Frog Potting Soil is well known for nurturing young seedlings to give them the required ingredients till they mature. It is made for outdoor and indoor growers and gives the plant all essential requirements for growth.

The best thing is that you do not have to worry about cannabis root rot issues because the Fox farm soil is tested and has an optimal perspective of water preservation/ retention and drainage. This feature ensures that the plant is well moisturized at all times for the roots to absorb.


  • Has Proper Water Drainage and good Water Retention
  • It can be used right from the box or bag
  • Abundant in fungi and beneficial microbes
  • Has microorganisms that are required for root development
  • Has a loose and light texture and is well aerated
  • Help cannabis plants feed more aggressively
  • Provides a strong plant structure


  • Moss increases greenhouse gases which hence increases fire risk

What are the Characteristics of Quality Cannabis Soil?

Soil comes in four different types. So if you intend to plat your cannabis plants without using the store-bought mixes, you must check their characteristics to ensure that it is suitable for your plants.

Let's have a look at the different soil types;

a). Silty Soil

Silty soil is a medium-coarse soil with a high mineral and organic matter concentration. Its water retention is good, but drainage is adequate. Silty soils are extremely simple to work with. It is one of the most fruitful soil types due to the minerals and organic elements.

b). Sand Soil

Sandy soil is gritty and drains well, although it retains little water. Nutrients like nitrogen are readily washed away when plants are irrigated. Sandy soil is simple and a good option for cannabis growers.

Sandy soil has good drainage that allows free air circulation; however, this also means that it does not retain water and needs frequent watering.

c). Clay Soil

Fine mineral particles make up clay soils. This soil is heavy and difficult to work with. However, it is high in nutrients and minerals, making it an excellent choice for organic growing. Clay soil holds water well but has extremely poor drainage.

d). Loamy Soil

Loamy soil comprises sand, silt, and clay soils with organic compounds thrown in. It's one of the greatest soil types for cannabis cultivation because it has excellent water retention and drainage and is high in minerals and oxygen. The disadvantage is that this sort of soil can be costly.

Improving Soil Quality

Natural soil may not be perfect for growing the best cannabis plants. However, if you are not ready to use the store-bought ones, you can improve the quality of the readily available soil and grow healthy plants.

So how can you improve the quality of the soil? In simple terms, you can add other materials to your soil to make it more suitable for cannabis.

a). Coco Coir

Coco Coir is coco fiber made from coconut husks. These light fibers have a high water retention rate and can help to lighten dense soils. To grow their cannabis, some people utilize a pure coco substrate with particular fertilizers.

However, depending on the makeup of your foundation soil, it's a good idea to add up to 30% coco coir to improve existing soil.

b). Nutrients

You won't need to add fertilizers to your DIY cannabis soil if it's high in organic matter. Unfortunately, some producers make the error of "fertilizing" their soil by adding manure and vegetable scraps.

As a result, the soil becomes "too hot" for the plants, hampering their development. If you want to use your veggie leftovers in your garden, you'll need to compost them first.

You may readily acquire bottled solutions matched to a plant's growth phase if you think you need to adjust your cannabis soil with nutrients.

c). Perlite

The most common soil amendment is perlite. Perlite comprises light, bright-white rocks that help the soil drain and breathe better. Perlite may also hold a lot of water. Add 10–15 percent perlite to your soil to improve it. You can add more, but your soil will become too light, allowing nutrients to leak out. Perlite is frequently added to high-quality commercial soils.

d). Clay Pebbles

Clay pebbles are commonly used in hydroponic systems by most cannabis farmers. Did you realize, though, that you can utilize them to improve soil structure? For example, putting clay pebbles in the bottom of your raised beds and containers can help with drainage and prevent water from accumulating at the base, which can lead to root rot.

You can also add these pebbles at the top of the container to act as mulch. This way, they will help trap moisture in the soil by preventing excess evaporation. The pebble mulch also casts shade over the top layer of soil, preventing weeds from growing and keeping beneficial microbes sheltered from the hot sun.

e). Vermiculite

Vermiculite is also used o make soil lighter, just like perlite. It is a heat-treated mineral that has great water retention capabilities.

Although vermiculite and perlite have some similarities, they serve different purposes; Perlite helps with drainage and airiness, whereas vermiculite helps with water retention.

Perlite and vermiculite work well together, so you can use both. Vermiculite in the range of 10% is suitable.

f). Worm Castings

Worm castings are commonly used as a nutritional soil addition because they include a variety of beneficial microorganisms. On the other hand, Worm castings will increase your soil's texture, drainage, and water retention. Use roughly 25–30 percent worm castings when amending your soil.

What to Consider Before Purchasing the Best Soil For Growing Marijuana Plants

a). Soil Texture

The most commonly known soil textures are sand, rock particles, silt, and clay soils. Although the soil texture will vary from place to place, the best soil for cannabis should be 40% clay and silt and 20% sand due to the difference in the climate.

The combination is also called loamy soil; if you have soil with too much clay soil, there will be slower drainage, too much silt will create poor aeration and drainage, and there will be low drainage levels if there is too much sand in the soil.

Being aware of the soil texture will allow you to know the ingredients for your potting soil. To advance the soil texture, you should consider adding organic elements to the soil. Add any type of soil with the organic matter for natural decay and that has more limited soil chemical reactivity to your soil for proper cannabis growth.

b). Soil Composition

Most new weed growers find it challenging and tedious to make their soil mix by themselves, and it is more convenient for them to purchase ready-made cannabis soil. The soil can contain living organisms, water, air, minerals, and other organic nutrients, giving the cannabis plants sufficient foundations for growth promotion.

Calcium, carbon, nitrogen, manganese, sulfur, phosphorous, and potassium are some of the minerals you will find in these best organic soils you purchase. They ensure that the cannabis plant has enough water, proteins, and chlorophyll and that the soil's ph levels are regulated.

Organic nutrients ensure that the superorganic soil gives the plant enough nutrients to strengthen the cannabis plants. They also add nitrogen levels to the soil mix. Organic nutrients are obtained from dying and decaying plants and animals and are fundamental. Best organic soil also contains forest humus to support healthy growth.

Air is also very crucial in the growth of plants, and it is usually found in the spaces in the soil. The air gives the living soil a good balance for cannabis plants to flourish. Water is also a catalyst for plant nutrition.

Bacteria, fungi, algae, arthropods, nematodes, protozoa, and worm castings are microorganisms in good cannabis soil. These microorganisms manipulate hormone protection against pathogens.

c). Ingredients

The soil ingredients are among the essential factors you should consider when buying potting soil to grow your weed. There are many variations of cannabis soil, and it can be hectic to settle on one that will make sure that you have the right soil. You will need to understand the ingredients used in making these super organic soils.

First, you should make sure you buy organic soil and then establish the soil's texture and the brand you want for your super soil. You are then supposed to check the ingredient used to make the soil you choose. The crucial ingredients you should check are; Bat Guano, sphagnum moss peat, organic earthworm castings, Fish meal, Plant Food, Coco Coir, Dolomite Lime, Sandy Loam, and several others.

If the label chart of the soil indicates the mentioned ingredients, it is the best potting soil for Marijuana. It also indicates that the super-organic soil is suitable for growing your young cannabis plants.

d). pH Value

The best soil for cannabis will have the proper pH, around six. If you need to test the soil pH levels, you will have to purchase a special kit that will enable you to measure the ph levels of the soil. You will not need to worry much about the ph levels of your soil because most soil mixes have buffing features that assist in keeping a moderately constant pH. It is advisable to use a big plant container to give the soil enough space to buffer.

e). Drainage

Good quality cannabis soil should have good drainage to promote healthy growth. If the soil you have has poor drainage, you will notice that there will be a pool formed every time you water your plants. For better growth, weed plants should have good drainage within the waterings. A soil mix with amendments like coco coir, perlite, and vermiculite will have good drainage qualities.

f). Water Retention

Good soil for growing cannabis should have good drainage features, which means the soil mixes should be drained quickly and at the same time retain enough moisture for the plant. The best soil for weed growing should have a perfect blend; for example, sandy soil and silty will drain water faster while clay soil will retain too much water; a blend of the three will provide a sound draining soil mixer. Loam soil is the best soil that has optimal retaining water capacity.

g). Number of Cannabis Plants

Some of the soil mixtures we've looked at aren't exactly cheap. So, before you buy the best cannabis soil, figure out how many plants you'll be growing. You won't end up with too much or too little potting soil this way.

A single bag of potting soil can maintain a single plant or roughly six weed plants in small pots or containers. If you're growing more than six plants in a large container, though, you could need more than one growing cannabis potting soil bag.

h). Organic Vs. Inorganic

Organize mixtures provide nutrients derived from natural sources. This is the superior alternative because these soils are excellent for your overall health and do not affect the environment. These are the alternatives we've looked at thus far.

On the other side, inorganic potting cannabis soil is the polar opposite. This cannabis soil is slightly less expensive than organic outdoor or indoor soil. As a result, the decision is entirely up to you and your tastes.

i). Additional Aeration

Some of the soil mixtures listed above contain perlite, while others do not. Perlite is a substance that enhances the amount of oxygen in your marijuana soil. Your cannabis plant requires oxygen to thrive. As a result, having more air pockets in your soil mix might be quite beneficial.

Good drainage, more excellent water retention, and appropriate root development are just a few benefits. However, poor drainage might lead to bacterial root rot and fungus in your initial potting soil. As a result, you can test your soil mix to see if it needs more aeration or function without perlite.

How is Cannabis Grown in Soil?

It's straightforward to grow cannabis in the best cannabis soil, especially when it's already pH balanced. So here are some pointers for getting your marijuana plants' potting soil ready.

To begin, fill your container 3/4 full with potting soil. Place your plant gently in its new home, then carefully add more potting soil to cover the roots.

The fundamental guideline of cannabis soil is never to compact it. Cannabis roots benefit from the nutrients and the air spaces found in cannabis soil mixtures.

Because these tiny pores prevent roots from decaying, it's critical not to press hard on your cannabis potting soil mix.

If the pH of your marijuana soil mix has already been adjusted, all you have to do now is add water. However, wait until your plant has quenched its thirst before adding more water to avoid overwatering symptoms.

Frequently Asked Questions on the Best Soil for Growing Cannabis

1. What is sphagnum peat moss used for?

Small-scale and professional growers use sphagnum peat moss to add to their gardens or container plants as a soil additive. In addition, peat moss is commonly used for growing weed and other plants.

2. Can you plant directly into organic super soil?

When growing cannabis seeds or any other young seedlings directly into the super soil is not okay. Instead, you should fill your container plants with the super soil halfway and fill the remaining part with the best soil for cannabis, similar to the one you use for your soil mixtures.

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