Best Soil For Marijuana Seeds

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Been trying to figure out what is the best soil for cannabis? Not sure where to start? Read on to learn more about different soils and what's right for you. Want to know more about best soil for cannabis? Check out our guide to get started with expert recommendations. If you’re growing cannabis in soil, you have about as many options to try as there are strains of marijuana to grow. Growing in soil is great if you like the idea of a somewhat forgiving substrate or don’t want to have to learn all the details of hydroponics growing. There are a lot of different ways to grow in soil and a lot of debate in the industry about what makes the best soil for growing marijuana. One of the most misunderstood and overlooked additives to a marijuana soil mix is worm castings. What does it bring to the table and is it a part of the best growing soil? Figuring Out the Best Dirt for Growing Weed When you’re trying to grow cannabis, a lot of different factors play into the decision of what to add to your soil. Are you growing indoors? Out in a field? In a pot on the back porch? Is the plant going to be in direct sunlight all the time? What strain are you trying to grow? Is it autoflowering or photoperiod? Confused yet? Making Super Soil Simple with Worm Castings If all these questions are making you feel like you need a hit, you’re not alone. It almost feels like you need a PHD in soil science to be able to grow a damn weed plant these days. Luckily, there’s a simpler way to achieve substantial plant growth without a lot of hassle and effort. Hands-Off PH Management One of the battles that most cannabis growers deal with is maintaining the PH level of the soil (or liquid in hydroponics) throughout the grow. One of the amazing things about adding the right amount of worm castings to the soil is that it will help you manage the PH level at an optimum range for marijuana growth. The generally accepted range that many growers try to stay within is anywhere from 6.0 to 7.0. Cannabis plants grow best when the PH level is just slightly acidic, meaning the number is just below 7. The pH level of pure earthworm castings is roughly 7.0, or neutral. When you add a rich black peat dirt or compost that has a more acidic PH, the worm castings help get the whole mixture into that optimal range of 6.0-7.0. Wouldn’t it be nice to be able to not have to mess with the PH level of your soil every day? Adding chemicals and other additives to get the PH into that perfect range? With the right amount of worm castings mixed in, you won’t have to do much. Mix at least 20% castings into a good soil or compost mixture at the beginning before you plant, test the PH and then leave it alone. Depending on what exact mixture you’re using, you might only have to add more castings once a month or once every couple of months. They will help regulate the PH and keep it at that perfect growing range throughout the grow. What’s the Right Percentage When Mixing Soil for Marijuana? So how much worm castings should you use when making soil for marijuana? There isn’t really a 100% correct answer for every situation. You could grow in 100% worm castings if you want. There isn’t a ton of scientific research out there to show what the exact percentage should be. One study found that a mixture of up to 80% earthworm castings and 20% dirt was the most effective for growing cannabis. We would recommend running some tests with the strain of marijuana that you’re using, with any other additives that you plan to include and see what works best for you. Anywhere from 20% worm castings up to 80% will have a positive impact on the plant. Mixing with Other Supplements When making your perfect weed super soil, there are many different amendments or growing mediums that you could throw in. Some of the most popular choices are perlite, bat guano, and coco coir. Perlite is often used to help the growing medium with drainage. This is beneficial because it doesn’t allow water to build up in the soil and create rot in the roots of the plant. Some experts recommend a mixture that contains up to 30% perlite. However, if you’re adding in a higher concentration of worm castings to the mixture, you can reduce the percentage of perlite you use. Worm castings are great for aeration and water regulation in the soil. Therefore, you get some of those benefits from the worm castings. Coco coir is a popular base for growing marijuana in because of its ability to provide aeration and drainage. It is lightweight, cheap, and easy to use. The percentage that you use of coco coir can also vary, depending on your preference and needs. Many growers recommend using between 30 and 50% or more. Again, if you’re using a larger concentration of worm castings, you can scale back on the coco coir because of the benefits that the castings provide. Making Living Soil with Worm Castings The big benefit of using worm castings when making soil for cannabis is that it improves the microbial life substantially. High quality worm castings can provide microbes like nothing else. If you’re trying to grow marijuana in an organic manner, you really can’t beat it. The microbes help break everything in the soil down to an easy-to-digest format for the plants. They soak up all the good stuff and get a constant stream of nutrition throughout the grow. Common Misconceptions Cost – Throughout the weed growing community, there are some common misconceptions pertaining to worm castings use. One of the most common is that you should sparingly use worm castings because they are expensive. In reality, they’re not that expensive compared to a lot of the commercial super soil mixtures and other supplements or chemicals. You can actually increase the percentage of worm castings in the mixture without having a big impact on the overall cost of the grow. If you’re already using a commercial super soil mixture, you won’t really notice a difference on the cost by increasing the worm castings percentage. You will, however, notice a difference in how easy it is to grow cannabis and the yield of the plant. All Worm Castings Work the Same – One of the biggest misconceptions in the growing community is that all worm castings are the same. Nothing could be further from the truth. Pure earthworm castings (not vermicompost from red wiggler worms) has a much higher microbial count and nutritional density. Simple Grow worm castings are produced in a controlled environment with a controlled, premium diet for the worms. This creates the finest castings with consistent nutrition for the plants. If you’re used to using cheap, generic worm castings from the big box store, you’ll be shocked at the difference in growth you get from Simple Grow castings. Not all castings are created equally. Water Management If you’re growing in draught conditions or simply don’t want to use as much water, worm castings will help a lot! The structure of the castings absorbs water instead of letting it all flow through and drain out. By mixing in worm castings at a 20% or higher threshold, you’ll be able to get water to the roots of the plant when needed. If you forget to water once in a while, this will bail you out! Regardless of whether you’re growing indoors or out, using a quality living soil for your grow can produce some of the highest quality buds. Adding a higher concentration of premium organic worm castings can make your life as a grower easier, while growing better plants at the same time.

Learn now how to choose the best soil for growing cannabis

Most weed gardeners know that growing cannabis in soil is a common and effective growing method.

The difficulty is that growers have to peruse through many soil options and may find it challenging to determine the right option for them.

Well, sit tight! In this article, we’ll be showing you how to choose the best soil for cannabis to give your marijuana the best chances of fat buds and a huge yield.

Why is choosing the best soil for cannabis very important?

Soil is one of the three components (including water and light) needed to help a plant

Choosing the best soil is vital as, without it, a plant can’t grow effectively and may end up lacking nutrients or even under developing. Good earth also helps provide plants with the health needed to survive under challenging weather conditions.

Along with learning about temperature and humidity for growing weed, understanding soil is vital. It spells the difference between a plant that didn’t grow to one that exceeded expectations.

The components that make up the soil

Soil consists of several components and is quite complex in its makeup. Let’s look at what these are:

  • Air: 25% of soil is simply air.
  • Water: A further 25% of the earth is water. It’s vital for moving nutrients to the plants.
  • Clay: One of the three primary materials found in soil, clay, like the other minerals, is derived from broken-down rocks.
  • Sand: This is one of the primary minerals found in dirt. Minerals, in fact, make up 46% of all soil.
  • Silt: The second of the primary minerals found within the soil.
  • Organic matter: This makes up the remaining 4% of the earth. Soils high in organic matter are brilliant for plant growth.

Knowing what good soil is

You can identify excellent cannabis soil by looking at a few key indicators.

  • Dark and loose: Dark soil is rich soil. It means that they contain plenty of organic matter, sodium, and healthy nutrients. Loose soil allows for better aeration.
  • Good drainage & water retention: Good drainage means that the marijuana water can drain to the bottom well. Well-drained earth ensures that your cannabis stays wet for a reasonable amount of time. An appropriate amount of water retention is vital to keep cannabis healthy.
  • The correct pH value: The ideal pH value is about 6.0 as cannabis plants thrive better in a slightly acidic environment.
  • Organic matter: Organic matter is decomposed material derived from plants and animals. It helps provide nutrients and improves the water holding capacity of the soil. Examples include compost and manure.

Choosing the best soil for marijuana

The best soil depends on the conditions that you’re growing your marijuana. So, for example, what’s needed for outdoor marijuana is different from that for indoor cannabis.

Let’s break it down.

Best soil for outdoor cannabis

The benefit of growing cannabis outdoors is that your plants won’t be as restricted and can further grow their roots.

However, you’ll have to monitor and possibly change the soil’s pH level if it’s not suitable.

Cannabis plants all need nitrogen, phosphorus, and potassium in their soil ‘diet’. These nutrients will be absorbed at different rates and need to be renewed with a good marijuana fertilizer from time to time.

A dark, crumbly loam works best outdoors that’s mostly silt.

Best soil for indoor cannabis

Loamy soil is the best for indoor cannabis. An ideal mixture of 40% silt, 40% clay, and 20% sand offers a loose soil texture for adequate oxygenation and root growth. This mix also offers good water retention, drainage, and an ideal pH level of 6.0.

Best potting soil for cannabis

Firstly, it’s important to note that no matter what pot you use, always make sure that there are holes at the bottom to prevent your cannabis from drowning.

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Cannabis can be effectively grown in pots using pre-packaged organic soil.

An alternative is to make what is known as a ‘super soil’ mix. You’ll have to find a super soil recipe or order a mix online. It’s a great option as it self-regulates its pH levels.

Best organic soil for cannabis

Creating the best organic soil for marijuana is tricky, but there are a few components that can drastically improve its health and efficacy:

Component What it offers
Worm castings This is a good source of nitrogen. It’ll also give your soil the added benefit of many micronutrients.
Bone meal For a source of phosphorus, this is the way to go.
Chicken manure Chicken manure is an excellent source for adding nitrogen and phosphorus to your soil.
Bat guano This is also a good way to get phosphorus and nitrogen into your organic soil. It also diversifies the soil’s bacteria.
Compost Compost piles can be an excellent source of nutrients such as potassium.
Kelp meal Both promoting microbial diversity and offering potassium, kelp meal is a great component to add to organic soil.

Best soil for autoflowering cannabis

Autoflower cannabis seeds transition automatically from the vegetative to flowering stage regardless of the light availability.

However, for this type of cannabis, light and aerated soil is preferred. This aids the roots in growing deeper.

You can make the best soil for autoflowers from peat moss, compost, vermiculite, and coco coir.

Store-bought vs. homemade

If you’re not interested in the hassle of putting together your own soil, then you can always stop at a local shop or peruse an online store for some good-quality mix that’s ready-made.

Although homemade soil may lack on some fronts, it does offer certain benefits. Let’s take a look at what those are compared to store-bought:

Homemade Cannabis Soil Store-Bought Cannabis Soil
Greater flexibility of choice. Already pre-packaged.
Generally cheaper than store-bought cannabis. More expensive than homemade cannabis.
It requires more research to figure out and can be complicated. The work to put together nutrients and research is already done for you.
Easier and cheaper to make in bulk. Often comes in smaller packaging.

How to make your own soil

Making your own soil may be preferable for many as ready-made soil mixes can be pretty expensive. Here are a few steps that you can follow to get started:

Step 1: To start with creating your marijuana soil mix, you can opt to find soil at your local gardening store. Alternatively, you can use the soil you have at home.

Step 2: Next, you’ll need to add the building blocks of cannabis: nitrogen, phosphorus, and potassium. You can find these components in worm castings, bone meal, and compost.

Step 3: Then, mix the soil. It’s as simple as that, and you’re on your way to having the best soil to grow marijuana.

Improving the soil, you already have

There are several minerals, soils, and nutrients that you can add to the soil you already have to make it suitable to grow excellent cannabis. Here are a few suggestions:

  • Coco for cannabis: Coco-coir is a flexible growing medium made out of coconut shells that grants your plants the ability to grow even faster than they already are.
  • Perlite: This can help loosen and provide excellent aeration to the soil and also aids in the speed of growth of the plant.
  • Vermiculite: This is good for dampening the soil and raising the pH level of your cannabis.
  • Worm castings: These are great for resolving nitrogen cannabis deficiencies. This nutrient-rich manure is perfect for any weed soil mix.
  • Nutrients: Along with nitrogen, potassium, and phosphorus, marijuana soil also needs calcium, magnesium, copper, iron, and many others.

Before we move on to our FAQs: if you want to know more about growing, be sure to check out our marijuana for beginners guide. It offers a lot of helpful information about costs, climate, strains, and much more relating to growing marijuana.

FAQs related to best soil for cannabis

We’ve scoured the internet and put together the most frequently asked questions to help you find the best soil for growing weed.

What is the best soil for growing cannabis?

Loam is undoubtedly the best soil for growing cannabis. Its pH level is close to the ideal level of 6.0. Regrettably, it’s quite an expensive soil to buy but a worthwhile investment if you want to grow the best marijuana plants possible.

What is the best soil for outdoor cannabis?

Outdoor cannabis grows well with organic soil. You can make your own or opt to purchase a mix online or at a local garden store.

What is the best soil for indoor cannabis?

The ideal is the same as the best overall cannabis soil, which is loam. If you’re not willing to pay the price, though, you can always opt for a nice pre-packaged cannabis soil mix. Just make sure that it’s full of quality nutrients!

What is the best organic soil for cannabis?

You’ll want a soil mix that’s teaming with all the necessary micro and macronutrients needed for your plants. A nice blend of worm castings, rock dust, bone meal, bat guano, and various other soil amendments is the way to go.

What are the best nutrients for cannabis in soil?

The fundamentals are:

  • Nitrogen (blood meal, ammonia, or cottonseed meal).
  • Phosphate (bone meal, slag, and rock phosphate).
  • Potassium (wood ashes or seaweeds).

It comes down to you

As you can see, there’s a lot to consider when choosing the best soil for growing marijuana. It depends on the type, where you’ll be growing it, and what you hope to achieve.

There are a lot of great ready-made products out there, both online and in-store. It just takes some time and research to figure out which is right for you.

Do you feel ready to start growing? Peruse the i49 website and decide on the right cannabis seeds for you to start your growing journey today.

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    10 Best Soil for Cannabis in 2022 – Buying Guide & FAQs

    Finding the right soil for cannabis planting is never easy. You never know what to get with such a sensitive plant.There are hundreds of soil products on the market. As a result, finding the right one can be difficult if you don’t know what to look for.

    I researched the best soil for cannabis and found that FoxFarm Ocean Forest Soil Mix is the best overall option.

    But depending on your preferences and grinding needs, you may want something different. If my #1 option is not for you, there are nine other soils on my list. Read on to find out which is the best soil for cannabis for you!

    10 Best Soil for Cannabis Review

    #1. FoxFarm Ocean Forest Potting Soil Mix

    The FoxFarm Ocean Forest is a garden potting soil mix that is ideal to use for cannabis plants.

    Each bag contains everything your cannabis plant needs for high growth and germination. It consists of a blend of earthworm castings, sea-going fish and crab meals, moss, bat guano, forest humus, and more. All of these mimic the properties of the highest quality naturally occurring soils.

    The soil mix also has sandy loam and hints of clay and silt. With this particular composition, the soil mix allows proper water drainage. Make sure it reaches all sections of the soil to ensure adequate germination.

    This is good soil because it has been pH adjusted such that its pH lies between 6.3 and 6.8. What this means is that the soil enables maximum uptake of fertilizer. This also encourages strong branching, leading to healthy and rapid growth.

    The only problem you may run into is when you use this for autoflower cannabis strains. It’s not recommended for that kind of cannabis. But for all others, it’s a good choice.

    • Diverse composition for effective growth.
    • Features loam that guarantees proper germination in all sections.
    • A mix of the highest-quality fertilizers.
    • pH-adjusted for maximum fertilizer uptake.
    • Encourages growth.
    • Ideal for most types of cannabis.
    • Not for autoflower cannabis strains.

    #2. FoxFarm Happy Frog Organic Potting Soil

    Fox Farm Happy Frog Organic Potting Soil is the ideal choice for bringing nutrition to your plants. It comes in a ready-to-use form straight out of the bag and it provides all the nutrients that your marijuana plant needs to thrive.

    This is a bag of 51.4 dry quarts or 2 cubic feet of soil. The potting soil is meant for container planting, whether growing a Ficus or a geranium. It contains mycorrhizae which enhances water absorbance and reduces the need for fertilizer. Additionally, this soil contains humic acid. As a result, it increases nutrient uptake and accelerates cannabis seed germination. In other words, your cannabis plants will thrive in this soil.

    And that’s not where it ends. The soil is ideal for both outdoor and indoor cannabis plants. The only catch is that the plant must be a container plant.

    The best part is that this cannabis organic potting soil comes with a pair of Pearsons Protective Gloves included. Use these gloves to protect yourself when handling any harsh chemicals.

    • Perfect for growing marijuana indoors and outdoors.
    • Reduces the need for fertilizers.
    • Enhances nutrient uptake.
    • Ready-to-use out of the bag.
    • Accelerates seed germination.
    • Only for container plants.

    #3. Coast Of Maine Stonington Blend Organic Growers Mix

    The Coast of Maine Stonington Blend is an organic mix of soil and fertilizers. It is a complex soil made especially for promoting plant growth in pots and containers.

    This soil has a diverse composition. It’s made from fish bone meal, endomycorrhizal fungus, worm castings, and perlite. It also contains dehydrated hen manure and Coco fiber that has been reinforced with lobster compost.

    You may think that that’s just a random blend of the best fertilizers. However, it’s actually quite balanced. This blend provides the perfect balance between soil texture, drainage, and water retention. All of these factors stack up to promote the healthy growth of cannabis plants in containers.

    What’s more, this blend is OMRI Listed. This means that it follows certain standards for organic fertilizers set by the OMRI.

    One major issue with this soil, which you will notice right off the bat, is that it’s only for potted plants.

    • A complex blend of fertilizers.
    • Promotes healthy and rapid growth.
    • Best for potted plants.
    • Authentic organic fertilizer.
    • A perfect balance of growth factors.
    • Only for potted/container plants.

    #4. Super Soil Autoflower Concentrate

    If you’re on the hunt for the best natural soil for growing autoflower seeds, then this is for you. The Super Soil Autoflower Concentrate is a 5-pound bag of soil that promotes autoflower growth.

    Just one 5-pound bag of the soil contains everything your cannabis plant will need from seed to harvest. This is living soil. This means that it contains fungi and microbes that encourage growth. And they symbiotically provide nutrition to the plant.

    One thing to keep in mind is that this is a concentration. It should be mixed in a certain ratio with regular potting soil and shouldn’t be used on its own.

    What sets this concentrate apart from the rest is that it’s an all-in-one blend. This is not only a top feed but also a soil amendment, compost tea, living soil, super soil, and potting soil.

    Be warned, however, this is only for autoflower cannabis and other autoflower vegetables. It would still work for regular seeds, but not so well.

    • Ideal for auto flower cannabis seeds.
    • Promotes growth and provides nutrition.
    • Also doubles as a super soil.
    • Suffices the plant from seed to harvest.
    • Includes fungi and microbes.
    • Only for auto flower seeds.

    #5. Purple Cow Indicanja 1 Cubic Foot Bag Organic Living Soil

    The Purple Cow IndiCanja is an all-in-one ready-to-use organic soil. This soil is used by many professional farmers and horticulturists as well as hobbyist gardeners.

    This is not living soil. It is a mix of compost from various plants containing all the essential nutrients for your plant.

    But the manufacturers didn’t just mix in any random combination of compost and organic matter. Instead, the formula was scientifically designed to provide the maximum benefit. This formulation is water-only, meaning you just need to water it after you dump it in the pot.

    Moreover, this compost-based solution has been grown and cultivated “cleanly”. This means that it won’t affect human health.

    However, you may run into a fungus gnat problem with this soil due to its unique composition. Plus, it’s targeted toward cannabis plants that need to retain a lot of water. Hence, you must be careful not to overwater it.

    • A mix of all essential nutrients your plant needs.
    • Made with scientific input.
    • Only need to water regularly.
    • Cultivated cleanly.
    • Retains a lot of water.
    • May cause a gnat problem.
    • Easy to overwater.

    #6. Foxfarms 733266 Soil, Strawberry Fields Potting

    FoxFarms Strawberry Fields Potting is a special potting soil. This has been designed to promote blooming and fruiting in plants. This potting soil is ideal for all types of flowering plants, including container gardens, house plants, and trees and shrubs.

    This potting soil mix is available in many sizes, including a 1.5 cubic-foot bag. You can also get the 27 and 55 cubic-foot totes for larger gardens.

    The FoxFarms Strawberry Fields potting soil is mainly coco coir-based. This is what allows it to retain less water and provide for better water drainage. It doesn’t contain a lot of peat, which means that it must be watered frequently.

    It’s highly recommended for mature plants that need to flower, meaning it’ll be by your side when your cannabis is ready for harvesting. The soil pH is about 6-7, which is ideal for growing weed.

    However, this soil is strictly for flowering plants. It’s not good for small plants as it simply won’t be as effective.

    • Highly recommended for mature cannabis.
    • Available in 3 sizes.
    • Better water drainage.
    • pH is perfect for growing cannabis.
    • Ideal for flowering plants.
    • Must be watered frequently.
    • Not good for small plants.

    #7. Roots Organics Original Potting Soil

    The Roots Organics is a potting soil ideal for fast-growing plants that require a lot of care and nurturing. It’s the best choice for cannabis due to its high level of water retention.

    To begin with, this mix is made from perlite and coco fiber, two of the best components for plant growth. Additionally, it features pumice, peat moss, and composted forest material. These ingredients lead to better water retention and reduce the need to water the plant.

    Roots Organics also doubles as living soil. It contains living mycorrhizal fungi that enhance your plant’s ability to take up water through the roots.

    What sets this organic potting soil aside from the others is that it comes ready to use right in the bag. Simply cut the top of the bag and plant your seeds. You can also dump the contents into a container garden.

    You might, however, notice some fungus gnats, which are common with the composition this soil has.

    • Promotes healthy plant growth.
    • Enhances nutrient uptake ability.
    • Comes ready-to-use in the bag.
    • Retains a lot of water.
    • Best for cannabis plants.
    • May cause a fungus gnat problem.

    #8. Brut Super Soil – 30 Lb

    The Brut Super Soil is an organic soil concentrate designed for plants that require extra nutrients. It contains all the nutrients that your cannabis plant may be lacking.

    For starters, it’s loaded with bacteria and enzymes that provide all the necessary nutrients your plant needs. On the organic side, it includes Brut worm castings, mycorrhizal fungi, composted cow manure, and kelp. These ingredients help enhance the nutrient uptake ability of your plant.

    On the inorganic side, you get elements like magnesium, potassium, nitrogen, and phosphorus. These are required for healthy plant growth.

    Keep in mind that this is only a soil concentrate. It is to be mixed with regular potting soil. What’s more, the Brut Super Soil contains peat moss which helps it retain more water. For cannabis plants, this is crucial as they require a lot of water.

    What’s more, this soil concentrate is completely non-toxic and odor-free. So it won’t create an unpleasant and unhealthy environment in your garden.

    • Enhances nutrient uptake.
    • Provides all the essential elements.
    • Perfect for cannabis and other plants.
    • Retains a lot of water.
    • Highly organic.
    • Must be mixed with regular potting soil.

    #9. Big Rootz All Purpose Potting Soil

    Big Rootz is an all-purpose potting soil ideal for growing cannabis and other plants. It has been carefully formulated so that it offers maximum plant growth and helps in nutrient uptake.

    This formulation is backed by research and increases plant vigor to lend it strength and sturdiness. This is a blend of peat and triple-washed coir. The peat-based formula indicates that it retains more water and doesn’t need to be watered very often. This is more than ideal for cannabis, a plant that needs a lot of water.

    In addition to that, the Big Rootz All-Purpose Potting Soil contains worm castings and compost. Both of these provide essential nutrients such as Nitrogen to the roots of the plant.

    This potting soil has been pH-adjusted to provide maximum results and increase the water uptake. However, you may run into a fungus gnat infestation.

    • Backed by research.
    • Retains a lot of water.
    • Provides essential nutrients to roots.
    • A balanced pH for maximum growth.
    • Helps in water and nutrient uptake.
    • May lead to a fungus gnat infestation.

    #10. Mother Earth Terracraft Potting Soil

    If you want potting soil that is recommended for all types of plants, then Mother Earth Terracraft is the way to go.

    This soil consists of Sphagnum peat moss as well as processed forest fertilizer. These ingredients help the soil to retain more water than regular potting soil. In the long run, this means you waste less water and also less time watering your cannabis.

    In addition to that, the Mother Earth Terracraft Potting Soil has moderate aeration which further helps it retain water. The blend is made from 8 ingredients, some of which include seabird and bat guano, and earthworm castings.

    The Mother Earth Terracraft potting soil has a balanced pH with a traditional buffer. So adding new soils won’t change the pH much. This helps it retain more nutrients and helps the plant take up more water.

    However, it’s not meant for autoflower cannabis.

    • Retains more water.
    • Doesn’t need to be watered frequently.
    • Enhances nutrient uptake.
    • Balanced pH with buffer.
    • A unique blend of 8 ingredients.
    • Not for autoflower cannabis.

    Buying Guide of Best Soil for Cannabis

    Stand-Alone Or Supplement-Based?

    Stand-alone soils do not require to be mixed with other ingredients such as fertilizers or amendments. But supplement base soil can be adjusted with fertilizers and amendments accordingly.

    Organic Or Inorganic?

    Organic soils are best for cannabis as they are safe for the environment and many times include living organisms. Inorganic soils are cheaper and may be useful in some cases. Inorganic soils are usually better if you want to keep track of what and how much nutrients your plant is getting. They state explicitly what minerals they use and in what proportions.

    Living Soil or Not?

    Living soil contains microorganisms like bacteria and mycorrhizal fungi. So, living soil is ideal as it forms a symbiotic relationship with your plant. The bacteria and fungi allow your plant’s roots to take up more nutrients and water. However, they can give rise to fungus gnats and other insects.

    The Number of Plants

    Lastly, consider how many plants you have and buy the right size of potting soil accordingly.

    General Features of The Best Soil for Cannabis

    Nutrients And Amendments

    The most commonly used amendments for growing cannabis are:

    • Bat guano.
    • Bone meal.
    • Soft rock phosphate.
    • Shrimp meal.
    • Crab meal.
    • Seabird guano.
    • Fishbone meal.

    In addition to that, cannabis plants require a lot of Potassium, Nitrogen, and Phosphorus.

    Drainage & Water Retention

    Most cannabis plants require a lot of water. Hence, you should look for soils that have a lot of water retention. These don’t need to be watered often.

    Ph Value

    The pH should stay between 6 and 7. You should look for soil that acts as a pH buffer, meaning it resists changes in its pH to some extent.

    What is the Best Soil for Growing Cannabis?

    Soil Types

    Four basic types of soil can be used for marijuana growth. These include loam, silt, clay, and sand. And each of these has its pros and cons when it comes to gardening marijuana.

    Sand is more root growth permeable, but it doesn’t hold fertilizer or water that well. Whereas clay is just the opposite to that. It can become pretty hard when dry and hot, and roots find it tough to penetrate it.

    During this time, clay doesn’t drain very well and becomes hard to cultivate. However, it is rich in natural nutrients and minerals.

    On the other hand, Silt has plenty of minerals and can also retain moisture pretty well. But it becomes too compacted and tough in various conditions.

    It also tends to form a crust that makes it difficult for nutrients and water to get to the roots of marijuana plants.

    Loam For Growing Cannabis & Other Crops

    Loam is the best option of all four types for growing marijuana and many other types of crops. It is a mix of silt, clay, and sand, and it brings the best qualities of all types of soils while reducing their negative traits.

    The pest composition is to go for 20 percent clay, 40 percent silt, and 40 percent sand. Most people think that the pH of 6.0 is ideally suitable for cannabis plants.

    However, the acceptable range is between 5.8 to 6.3. as pH levels remain close to neutral, loam is the best option to consider when growing cannabis plants.

    There are different test kits available for measuring acidity in your soil. You can also take a sample of your solid to your local extension agent.

    If it doesn’t feature proper acidity levels, you can use various soil amendments to increase or decrease the pH levels. Your local extension agent, garden store, or nursery can help you make the correct AdSense according to your requirements.

    Loam is the best option for containers, and you can use it for outdoor growing. However, it is also the most expensive soil available on the market.

    Nevertheless, if you are interested in growing the best possible plants, quality loam can reward you long-term.

    You can even make your loam mixture and add some organic matter. Then, if you have your separate compost bin, you can use it to improve your soil. It might take a lot of your time, but it can also produce magnificent results.

    What is a good potting soil for cannabis?

    The best potting soil for cannabis plants is loam, as it is for various other plants. It is a mix of silt (40 percent), clay (20 percent), and sand (40 percent). Its pH level remains between 5.8 to 6.3, and it can retain moisture and nutrients pretty well. This soil is also the most expensive type.

    Can you plant cannabis in any soil?

    You can plant cannabis in any soil, but there will be different implications, and each soil type has its pros and cons. Therefore, the best option to go for is loam soil, as it is a mix of all other soil types while amplifying their advantages and diminishing their drawbacks.

    What kind of soil do Autoflowers need?

    Autoflowering strains are similar to those photoperiod variations as they also prefer morse acidic soil slightly. You should go for the soil with pH levels between 6.2 to 6.5. But make sure that the soil is suitable based on its acidity.

    How To Make Your Own Organic Super Soil?

    You can make your organic super soil by using 8 large bags of coco fiber and mycorrhizae-rich cannabis soil. Add 25 to 50 pounds of earthworm castings to it. Now, take:

    • 5 lbs. steamed bone meal.
    • ¾ cups Epson salt.
    • ½ cup sweet lime.
    • 3 lbs. rock phosphate.
    • 5 lbs. Bloom bat guano.
    • 5 lbs. blood meal.
    • ½ cup azomite.
    • 2 tbsp powdered humic acid.

    Add all these together and you have your very own organic super soil!

    How To Grow Cannabis in Soil?

    The first thing you gotta do is fill up ¾ of your container with potting soil. After that, gently place the plant and carefully add more soil to cover up the roots.

    The rule of thumb here is to not fill it too compact. These roots tend to thrive from the nutrients within the cannabis soil and from the air pockets within the soil. the tiny roots will prevent the roots from rotting.

    Therefore, it is important to refrain from pressing down too much on the soil mix. If you are using soil that already has its pH level adjusted, you can simply add water. Let the plant satisfy its thirst before you add more water to prevent overwatering symptoms.

    Conclusion

    All the soils on the review list are top quality, and Fox Farm Ocean Forest Soil Mix is the overall best soil for cannabis. Not only because it has sandy loam and hints of clay and silt, but also it has good water drainage and pH value.

    Whichever option you choose, make sure it suits your plants’ needs and your budget.

    You may enjoy these related articles:

    Umer Abdullah

    Hey there! My name is Umer, and I am a garden enthusiast. I discovered the power of the gardening in my 30s. Now five years later, that critical connection with nature continues to improve my life. My goal is to empower you with the advice you need to grow your home garden.

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    If you’re growing cannabis in soil, you have about as many options to try as there are strains of marijuana to grow. Growing in soil is great if you like the idea of a somewhat forgiving substrate or don’t want to have to learn all the details of hydroponics growing.

    There are a lot of different ways to grow in soil and a lot of debate in the industry about what makes the best soil for growing marijuana plants. One of the most misunderstood and overlooked additives to a marijuana soil mix is worm castings for cannabis crops.

    What does it bring to the table and is it a part of the best growing soils?

    Figuring Out the Top Dirt for Growing Cannabis

    When you’re trying to grow cannabis, a lot of different factors play into the decision of what material to add to your soil. Are you growing indoors? Out in a field? In a pot or container on the back porch? What about moisture in the air? Is the plant going to be in direct sunlight all the time? What type are you trying to grow? Is it autoflowering or photoperiod? Confused yet?

    Making Super Loam

    If all these questions are making you feel like you need a hit, you’re not alone. It almost feels like you need a PhD in soil science to be able to grow a damn weed plant these days. Luckily, there’s a simpler way to achieve substantial crop yields without a lot of hassle and effort.

    Hands-Off PH Management

    One of the battles that most cannabis growers deal with is maintaining the pH level of the soil (or liquid in hydroponics) throughout the grow. One of the amazing things about adding the right amount of worm castings to the soil is that it will help you manage the PH level at an optimum range for marijuana growth. The generally accepted range that many growers try to stay within is anywhere from 6.0 to 7.0. Cannabis seedlings grow best when the PH level is just slightly acidic, meaning the number is just below 7.

    The pH level of pure earthworm castings is roughly 7.0, or neutral. When you add a rich black peat dirt or compost that has a more acidic PH, the worm castings help get the whole mixture into that optimal range of 6.0-7.0.

    Wouldn’t it be nice to be able to not have to mess with the pH balance of your soil every day? Adding chemicals, minerals, fertilizer, and other nutrients to get the pH into that perfect range?

    With the right amount of worm castings mixed in, you won’t have to do much. Mix at least 20% castings into a good soil or compost mixture at the start before you plant the seed, test the pH and then leave it alone. Depending on what exact mixture you’re using, you might only have to add more castings once a month or once every couple of months. They will help regulate the pH and keep it at that perfect growing range throughout the grow.

    What’s the Right Percentage When Mixing Dirt for Marijuana?

    So how much worm castings should you use when making soil for marijuana? There isn’t really a 100% correct answer for every situation. You could grow in 100% worm castings if you want.

    There isn’t a ton of scientific research out there to show what the exact percentage should be. One study found that a mixture of up to 80% earthworm castings and 20% dirt was the most effective for growing cannabis.

    We would recommend running some tests with the strain of marijuana that you’re using, with any other additives that you plan to include and see what works best for you. Anywhere from 20% worm castings up to 80% will have a positive impact on the development of the plant and root growth.

    Mixing with Other Supplements

    When making your perfect weed super soil, there are many different products or growing mediums that you could throw in. Some of the most popular choices are perlite, bat guano, and coco coir.

    Perlite is often used to help the growing medium with drainage. This is beneficial because it doesn’t allow water to build up in the soil and create rot in the roots of the plant. Some experts recommend a mixture that contains up to 30% perlite. However, if you’re adding in a higher concentration of worm castings to the mixture, you can reduce the percentage of perlite you use. Worm castings are great for aeration and water regulation in the soil. Therefore, you get some of those benefits from the worm castings.

    Coco coir is a popular base for growing marijuana in because of its ability to provide aeration and drainage. It is lightweight, cheap, and easy to use. The percentage that you use of coco coir can also vary, depending on your preference and needs. Many growers recommend using between 30 and 50% or more. Again, if you’re using a larger concentration of worm castings, you can scale back on the coco coir because of the benefits that the castings provide.

    Make Living Earth

    The big benefit of using worm castings when making soil for cannabis is that it improves the microbial life substantially. High-quality worm castings can provide microbes (such as helpful bacteria and fungi) like nothing else. If you’re trying to grow marijuana in an organic manner, you really can’t beat it.

    The microorganisms help break everything in the soil down to an easy-to-digest format for the plants. They soak up all the good matter and get a constant stream of nutrition throughout the grow. Don’t be so caught up with the NPK ratings (which talks about the rate of phosphorus, nitrogen, and potassium in a supplement), the microbes more than make up for the difference.

    Common Misconceptions

    Cost – Throughout the weed growing community, there are some common misconceptions pertaining to worm castings use. One of the most common is that you should sparingly use worm castings because they are expensive. In reality, they’re not that expensive compared to a lot of the commercial super soil mixtures and other supplements or products.

    You can actually increase the percentage of worm castings in the mixture without having a big impact on the overall cost of the grow. If you’re already using a commercial super soil mixture, you won’t really notice a difference in money by increasing the worm castings percentage. You will, however, notice a difference in how easy it is to grow cannabis and the yield of the plant.

    All Worm Castings Work the Same – One of the biggest misconceptions in the growing community is that all worm castings are the same. Nothing could be further from the truth.

    Pure earthworm castings (not vermicompost from red wiggler worms) have a much higher microbial count and nutritional density. Simple Grow worm castings are produced in a controlled environment with a controlled, premium diet for the worms. This creates the finest manure with consistent nutrition for the plants.

    If you’re used to using cheap, generic worm castings from the big box store, you’ll be shocked at the results you get from Simple Grow castings. Not all castings are created equally.

    Water Management

    If you’re growing in drought conditions or simply don’t want to use as much water, worm castings will help a lot with water retention! The texture of the castings absorbs water instead of letting it all flow through and drain out. By mixing in worm castings at a 20% or higher threshold, you’ll be able to get water to the roots of the plant when needed. If you forget to water once in a while, this will bail you out!

    Regardless of whether you’re growing indoors or out, using a quality living soil for your grow can produce some of the highest quality buds. Adding a higher concentration of premium organic worm castings can make your life as a grower easier, while growing better plants at the same time.

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