Best Soil For Cannabis Seeds

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Think growing weed is as simple as tossing some seeds into a pot of dirt? Think again. Here is the best soil for growing cannabis. Growing cannabis outdoors offers many benefits. Firstly, it can be very affordable. You do not need to provide a structure like a greenhouse or high tunnel. In addition, artificial light is not necessary if you place it in the right spot in your yard, because your plants can benefit from the sun’s abundant and free energy. In addition, you do not necessarily have to provide costly soil for your plants outside. But for the best results, you want good marijuana soil that will help your plants grow healthy and happy. DripWorks is here to offer you a few simple tips for finding and creating the best soil for growing marijuana outdoors. Soil Types Four basic soil types exist: sand, clay, silt, and loam. Each has its pros and cons for gardening. Sand is easily permeable for root growth, for instance, but it does not hold on to water or fertilizer well. Clay is just the opposite. When it’s hot and dry, clay can become hard as a rock, making it difficult for roots to penetrate. Clay drains poorly and is hard to cultivate. On the plus side, it is rich in minerals and natural nutrients. Silt soils have lots of minerals and retain moisture well. Like clay, however, this type of soil can become compacted and hard in certain conditions. It can also form a crust, making it difficult for moisture and nutrients to reach plants’ roots. Loam for Growing Marijuana & Other Crops Of these types, loam is by far the best soil mix for growing marijuana plants and many other types of crops. Loam is a mixture of clay, sand, and silt, bringing forth the best qualities of these disparate types of soil while minimizing their worst attributes. The optimal ratio for loam is 20% clay, 40% silt and 40% sand. Most folks think a pH of 6.0 is best for cannabis, with a range of 5.8 to 6.3 being acceptable. With a pH close to neutral, loam is typically in that zone or close to it. Test kits are available to measure your soil’s acidity, or you can take a sample to your friendly local extension agent. If your dirt does not have the proper acidity, soil amendments are available to lower or raise the pH level in your soil. Your local nursery, garden store or extension agent can make some suggestions. Loam is ideal for containers as well as for outdoor growing. Unfortunately, it is usually the most expensive soil to buy. But if you are interested in growing the best plants possible, it can pay big dividends in the long run. You can also build up your own loam soil by adding organic matter to it. If you have a compost bin, you can use the compost to improve your soil. This will be a time-consuming and ongoing process but with grit and persistence will pay off in the long run. Water, Light and Nutrients You will want to provide the proper amount of light and water to your plants, of course. A drip irrigation system can cut your water bills while improving the health of your plants. Kits are available that give you everything you need to get started. If you prefer, you can start from scratch and obtain separate components to put them all together. Just like humans, plants need the right nutrients. The most important ones for your cannabis plants are nitrogen (N), potassium (K) and phosphate (P). These make up the ratios you will typically see on fertilizer labels. The right balance is essential for healthy growth. Many pre-mixed marijuana fertilizers are available, making your job easier. But if you prefer, you can also formulate your own. 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.

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Best Soil for Growing Weed [The Grower’s Guide]

Whether you want to call it dirt or a growth medium, soil is a crucial component for growing marijuana. Choosing the best soil for your weed is arguably the most critical decision you’ll make when growing cannabis at home. Getting it right is likely the difference between a bountiful harvest and utter failure.

The apparent simplicity of picking soil often fools newcomers, and they frequently make mistakes that cost them their harvest. The truth is, you have to make a lot of considerations. For example, the soil you use for indoor growing is not the same one you’ll need for an outdoor grow. Then there is the small matter of things like pH, drainage, and a host of other criteria.

There are a large number of soil brands available, which is both good and bad news. You get a lot of options. However, with so many choices, how do you determine the best soil for growing your marijuana? The key is to analyze your situation, and our guide will help do the rest.

EDITOR’S CHOICE – Homegrown CannabisCo

Homegrown CannabisCo are the masters when it comes to seeds. Offering a massive variety of cannabis seeds that are well categorized, not only does this company create a resource for superb quality options including feminized seeds, it also provides extensive growing information for those looking for some support along their journey.

Pros & Cons of Growing Cannabis in Soil

Ultimately, you can choose between soil or a hydroponic system if you wish to grow weed at home. A hydroponic system is potentially extremely effective, but it is also expensive. Generally speaking, those cultivating their cannabis for the first time should choose soil. The roots of your plants will extend deep into the earth as they look for nutrients and water.

That’s why indoor systems, which have a lack of space, need to create smaller root systems for marijuana. Regardless of the root system you choose, make sure the temperature in the growing area stays around 68 degrees Fahrenheit.

Of course, ample water and oxygen in the soil is a must.

Irrigation in soil is easier than with hydroponic systems, as is fertilization. With so much information gathered from thousands of years of growing, you can quickly become a soil expert as long as you read the right articles!

On the downside, soil requires a ton of space, and it is cumbersome. You’re also more likely to have issues with pests than with a hydroponic system.

Choosing the Right Cannabis Soil Container Size

The size of the containers you choose will dictate the size of the marijuana plant’s root system. The more space the roots have, the faster they grow. You can expect problems to arise when the roots outgrow your container, so choose wisely! There is no need to go beyond a 10 x 10 x 10 cm container while your plants are still seedlings.

Once it reaches a height of 25cm, transplant the plant(s) to a container that is at least double the size of the first one. Once your plant hits the lofty heights of 80cm, move it to at least a 12-liter container. Once your plant hits a meter in height, you’ll need an even bigger box. This process continues until harvest.

Watering Your Soil

The soil type and growing environment determine the way you water the soil. Hot climates need more water, and colder climates need less.

When you water the plant, it moves essential nutrients and minerals to the roots. Then, they travel to the rest of the plant. Water cools overheated plants down and is a critical ingredient for photosynthesis. The best advice we can give is to water the soil until it is moist, but not wet to the touch. Overwatering aids the growth of harmful fungi, which can result in root disease, so exercise caution!

Quality Soil for Cannabis

Natural soil comes in four varieties: sandy, silt, loam, and clay. You are in for a nasty surprise if you think that soil is just one ‘type.’

Many soils will have a combination of at least two of the four types. Therefore, you can have sandy/silty, loamy/clay, silty/clay, and so on. If that isn’t confusing enough, there are different ratios of every soil type. It is an important consideration, however, because each one has its pros and cons.

Sandy Soils

Sandy soil is known for its large granular size and has a low pH. The issue with this type of soil is that it dries quickly and often experiences difficulties in moisture absorption. The nutrients also get washed away, and nitrogen, in particular, is lost rapidly from sandy soil.

On the plus side, sandy soil is easy to prepare for cultivation, offers good drainage, and contains high oxygen levels. It is one of the best options for growing weed indoors.

Silt Soils

This soil type consists of minerals such as quartz and fine organic particles. Although they hold moisture, silt soils have decent drainage and are one of the easiest to work with when wet. Also, silt soils are among the most fertile, which gives you a chance of a decent-sized harvest. With frequent irrigation, you can extend the length of the growing season. Silt soil is one of the best soil types for seedlings.

Loam Soils

Loam soil is a combination of sand, silt, and clay, typically in a 40/40/20 ratio. It has at least 20% organic compounds and can vary from being easy to work with to incredibly complex. To identify a loam soil, squeeze it. It should form a loose ball that quickly threatens to break apart.

This is a prevalent marijuana potting soil and has an almost neutral pH. It offers excellent drainage and water retention, contains high oxygen levels, and is naturally fertile. However, it is by far the most expensive option.

Clay Soils

This type of soil is among the best organic options for cannabis. Clays consist of fine crystalline particles created via chemical reactions amongst minerals or other natural resources. You can mold or shape clay soil, but it is hard to work with and drains poorly.

If you try to use this kind of soil, expect to have difficulty in getting the plant’s roots to penetrate the surface. Clay soil has a high pH. While it stabilizes plants, the soil is heavy and requires a lot of effort overall.

What Does Loam Soil Look Like?

Loam is, without doubt, the favorite weed soil of growers. It makes the best soil for potted plants and is probably the best soil for plants in general. It contains the right balance of all three soil types (clay, silt, and sand) along with humus. This combination ensures that loam has high calcium levels, but it also has a relatively high pH.

Loam has a dark color and is soft, dry, and crumbly when you hold it. Although it offers a tight hold on plant food and water, it drains exceptionally well. The air can freely move between the particles down to the marijuana plant’s roots.

How to Make Loam Soil

Loam soil is a combination of the three main soil types. However, don’t think you can create loam soil by adding clay soil to silt, or vice versa. If you try to add sand to clay, for instance, you’ll end up with a cement-like texture. In reality, creating loam soil for your plant is not a straightforward or quick process.

It is, however, the best soil for cannabis, which means it is worth the time and effort that you have to put in. No matter what type of soil you have, creating loam involves adding organic matter to it each year. The decomposing plant material creates the excellent drainage conditions your weed needs.

The trouble with organic matter is that it gets depleted rapidly. This means you have to amend it on a season by season basis.

The amount of work you must do depends on the balance of your existing soil. For instance, if it has high amounts of clay or sand, you’ll have to add large amounts of organic matter several times a year. You can add a two-inch layer of organic matter onto the surface of the garden. Then, you should work it into the first couple of inches of soil.

Buy Only the Right Soil for Your Cannabis Plants

It is normal to go to your local garden store full of enthusiasm. That is until you are knocked back by the enormous number of options. First of all, please note that buying it in bulk could be a mistake. There are no certifications or standards attached to soil quality. Believe it or not, some of these sellers provide you with soil from construction sites. They could even sell soil excavated from basements!

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When buying soil for weed, make sure you understand the basics of good cannabis soil. If you want your plants to offer lots of cannabinoids and trichomes, you have to pay attention to several variables. including:

  • Drainage, texture, and water retention
  • Nutrients
  • pH

Drainage, Texture & Water Retention

The texture, drainage ability, and water holding ability are arguably the most critical aspects of marijuana soil. Your plant will not produce a good yield if it doesn’t have the right mixture of water and oxygen in the roots 24/7. If there is too much water, the roots won’t get enough oxygen. If there isn’t enough water, the roots can dry out quickly and become damaged.

High-quality marijuana soil should have:

  • A rich and dark color
  • Loose texture
  • Excellent drainage; in other words, it should not make a pool on top of the soil for more than a few seconds
  • The ability to retain water without becoming muddy

It is unlikely that your cannabis soil will have the ideal drainage, texture, and water retaining abilities. Fortunately, there are a host of amendments available to alter the drainage, texture, and water-retaining capacity of your soil. Here are four of the most popular:

Coco Coir

This is made from coconut husks and manages to improve water retention without causing the soil to become heavy. When you use coco coir, the roots of your plant should develop quicker, and you’re less likely to overwater. You can grow your marijuana in pure coco coir. However, a maximum of 30% is best for a productive soil amendment.

Vermiculite

This enhances water retention and causes your soil to become ‘lighter.’ It works particularly well with Perlite.

Perlite

This is probably the most commonly purchased amendment and is ideal for practically any soil mix. It consists of airy ‘rocks’ known for their white hue. Perlite looks a bit like popcorn and improves drainage while adding oxygen. Use 10-20% to improve water retention. You can go as high as 40%, but you risk leaching nutrients faster. If you use Perlite and Vermiculite, don’t go above 50% for the two combined.

Worm Castings

Yes, we are talking about worm poop! Once you get past the initial horror, you’ll find that your marijuana plants adore worm castings. They improve water retention, drainage, and texture. Their natural nutrients are quickly broken down. Worm castings typically include useful microorganisms since they go through the digestive systems of worms. Keep the level of worm castings down to around 30%.

Nutrients

As long as you choose correctly, your cannabis soil should already have a vast array of nutrients because it consists of organic material. One mistake is to try and add organic material such as animal manure and rotting vegetables directly to the plants as fertilizers. You must break down the content first if you want your marijuana plants’ roots to absorb the nutrients.

Indoor growers need to find soil with a lot of nutrients.

This is because they don’t benefit from nature in the same way as outdoor growers. Use heat to sterilize the soil and add nutrient-rich potting soil mix. You can make it yourself, but newbies should purchase it from the garden store. Water the soil correctly. Also, keep it in a room with a temperature of 68 degrees Fahrenheit and test the pH every so often.

In case you weren’t aware, pH means ‘potential of hydrogen.’ It is a chemical scale that determines a substance’s alkalinity or acidity. The range goes from 0-14. A pH of 7.0 is neutral (pure water is 7.0, for example). Everything from 0-6.9 is acidic, while everything from 7.1 to 14 is alkaline.

Battery acid and hydrochloric acid have a pH of 0, while liquid drain clearing fluid has a pH of 14. Ideally, your cannabis soil is slightly acidic. Most experts believe that the ideal pH is 6.0. However, you are on solid ground if your soil’s pH is between 5.8 and 6.3. Your crop will survive outside of this range, but the yields are likely much smaller. If you stray too far from the 5.8-6.3 range, the plants will die.

Soils for Cannabis: Recommended by wayofleaf.com

If you are a beginner grower, you must purchase your soil from a garden store. Did you know that the vast majority of expert growers also buy their soil? A handy tip when talking with a store employee is to ask about the right kind of soil for tomatoes. It is an excellent option if you feel uncomfortable disclosing your desire to grow weed!

At wayofleaf.com, we took the liberty of recommending a few store-bought soils for your cannabis plants. Please note that these are NOT for seedlings, as they contain too many nutrients. These are soils designed to help your plant thrive once it reaches the vegetative stage. Otherwise, you need to look at potting soil brands when your plant is still a seedling.

Before we continue with the best soil brands for growing cannabis, let’s look at general guidelines for indoor and outdoor soil.

Best Soil for Indoor Plants

Overall, you can’t go wrong with an organic super soil and fertilizer mix. The super soil offers the ideal blend of nitrogen, phosphorus, carbon, and a myriad of other nutrients. You can make them yourself, but once again, we recommend investing in store-bought pot soil.

Best Soil for Growing Weed Outdoors

When growing weed outdoors, make sure you use soil that feels fluffy in your hands. It needs to possess a reasonable amount of nutrients, and good drainage is essential. Compost and store-bought fertilizer can form a fertile and productive base. Crucial nutrients include Nitrogen, Potassium, and Phosphorus.

Best Cannabis Soil Brands

Best Organic Soil – Roots Organics

This organic blend is designed to enable a higher water-holding capacity. It includes ingredients such as bat guano, kelp meal, and fish & crab meal. It is suitable for marijuana plants that are beyond the seedling stage. We love the ready-to-use pot because it enables you to transfer your plants immediately.

Best for Seedlings – Espoma

This is a great option if you want to nurture your crop from seedling through to harvesting. This Espoma soil contains excellent nutrition for early-stage growth. You will need to begin with small pots, before transferring your growing plants later. It contains peat moss, perlite, and peat humus – not to mention a hose of nutrients that aid strong root growth.

Best of the Rest – FoxFarm FX14047

The Fox Farm company has over three decades of experience in the industry. It is a well-renowned maker of cannabis soil in the United States. Its FX14047 soil mix contains a unique blend of mycorrhizal fungi, and much more. It helps increase root development rapidly. When you use FX14047, your plants will develop a strong structure and experience rapid vegetative growth.

It is a lightly textured and well-aerated soil. Its pH is adjusted to ensure your plants feed more aggressively. You get two cubic feet of organic soil, and it is ready to use out of the bag.

The Best Soil for Growing Marijuana Outdoors

Growing cannabis outdoors offers many benefits. Firstly, it can be very affordable. You do not need to provide a structure like a greenhouse or high tunnel. In addition, artificial light is not necessary if you place it in the right spot in your yard, because your plants can benefit from the sun’s abundant and free energy.

In addition, you do not necessarily have to provide costly soil for your plants outside. But for the best results, you want good marijuana soil that will help your plants grow healthy and happy. DripWorks is here to offer you a few simple tips for finding and creating the best soil for growing marijuana outdoors.

Soil Types

Four basic soil types exist: sand, clay, silt, and loam. Each has its pros and cons for gardening.

Sand is easily permeable for root growth, for instance, but it does not hold on to water or fertilizer well.

Clay is just the opposite. When it’s hot and dry, clay can become hard as a rock, making it difficult for roots to penetrate. Clay drains poorly and is hard to cultivate. On the plus side, it is rich in minerals and natural nutrients.

Silt soils have lots of minerals and retain moisture well. Like clay, however, this type of soil can become compacted and hard in certain conditions. It can also form a crust, making it difficult for moisture and nutrients to reach plants’ roots.

Loam for Growing Marijuana & Other Crops

Of these types, loam is by far the best soil mix for growing marijuana plants and many other types of crops. Loam is a mixture of clay, sand, and silt, bringing forth the best qualities of these disparate types of soil while minimizing their worst attributes.

The optimal ratio for loam is 20% clay, 40% silt and 40% sand. Most folks think a pH of 6.0 is best for cannabis, with a range of 5.8 to 6.3 being acceptable. With a pH close to neutral, loam is typically in that zone or close to it.

Test kits are available to measure your soil’s acidity, or you can take a sample to your friendly local extension agent. If your dirt does not have the proper acidity, soil amendments are available to lower or raise the pH level in your soil. Your local nursery, garden store or extension agent can make some suggestions.

Loam is ideal for containers as well as for outdoor growing. Unfortunately, it is usually the most expensive soil to buy. But if you are interested in growing the best plants possible, it can pay big dividends in the long run.
You can also build up your own loam soil by adding organic matter to it. If you have a compost bin, you can use the compost to improve your soil. This will be a time-consuming and ongoing process but with grit and persistence will pay off in the long run.

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Water, Light and Nutrients

You will want to provide the proper amount of light and water to your plants, of course. A drip irrigation system can cut your water bills while improving the health of your plants. Kits are available that give you everything you need to get started. If you prefer, you can start from scratch and obtain separate components to put them all together.

Just like humans, plants need the right nutrients. The most important ones for your cannabis plants are nitrogen (N), potassium (K) and phosphate (P). These make up the ratios you will typically see on fertilizer labels.

The right balance is essential for healthy growth. Many pre-mixed marijuana fertilizers are available, making your job easier. But if you prefer, you can also formulate your own.

Best Soil For Cannabis Seeds

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Natural Soil Mix for Cacti and Succulent with Simple Grow Worm Castings to provide drainage and nutrition.

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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