Best Soil For Marijuana Seeds

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In this post we are going to talk about the best soil for weed and what to take into account before choosing the one that will suit your grow 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. If you have an indoor cannabis grow set-up, you need the best soil for growing weed indoors. Our guide dives into what factors to consider and the best ones.

See also  Types Of Weed Seeds

Best Soil for Growing Weed

In this article we are going to talk about the best soil for weed. Any decent cannabis grower wants to know what are the best products for growing weed properly. Sometimes, there is a tendency to choose soils for weed based only on their price, when maybe spending a couple of extra quid would be helpful to solve future issues related to soil. This article is here to explain the pros and cons of the best soils for weed plants.

Soil is a mix of different compounds that humans have been using for centuries to improve their crops. In this case, seeing as we are talking about the best soils for growing marijuana we are going to look for compositions that cover this type of plants’ needs so they can develop fully and healthy.

Apart from mixtures that you can make yourself with different peats, mixtures like hummus, perlite and other additives, we’re going to focus on mixtures that come ready-made. This is the easiest way to choose the best soil for your grow. Some substrates are light (without any fertilizers, and almost 0.0 EC) and others come loaded with nutrients. Depending on what nutrients they have, they’ll be more suitable for the growing stage or the flowering stage.

Today, we’ll focus on some well-known light substrates (without additives):

Light Mix (BioBizz)

This mixture is perfect for growers that don’t fancy the idea of taking care of their plants every single day. It’s a high quality peat moss mix that retains humidity well. Even in hot regions you’d only have to water the weed plants every 2 or 3 days. During the early growing stages, plants need to be well taken care. This mix will be very helpful while the root development is taking place so that the soil doesn’t get too soaked. Otherwise, it can be difficult to get it dry again and the excessive humidity can severely damage the roots and choke the plant. If you water your plants correctly, this product is one of the best ones to use as it has plenty of benefits. Its EC values range between 0.5-1 and the PH levels should be between 6-6.8.

When using this substrate, 1L of water was enough to cover the needs of a flowering plant in a 7L pot for 48h.

Canna Terra Professional (Canna) soil for weed

This product is the most sold substrate because it has a great price and offers amazing results. It is a soil mixture that if well-treated, will treat you well in return. It’s extremely efficient in grows that have an automatic watering system, because it doesn’t hold a lot of humidity and it dries quickly, allowing for the plants to be watered frequently. This soil has Sphagnum peat and perlite in its composition. Placing clay pebbles, perlite or coco fiber on the bottom of the pots is advisable to ensure a good drainage.

Weed plants shouldn’t be left to dry out too much as it can be difficult to dampen them again. A tray with some water can be placed under the cannabis plants so the soil gets damp without any major difficulty. When dampening the soil, you shouldn’t compact the substrate too much because you’ll end up losing the perfect oxygen/water ratio, and you’ll end up with too much water. This is bad for the roots and can lead to rot.

An adult plant in the middle of its flowering stage will need 1L of water a day when using this substrate.

Light Mix (Plagron)


This soil has a spongy feel to it, similar to coco substrate but with the same consistency as soil. It’s a mixture of the best moss and it has no additives, so fertilizers can be used without any problems. Another special quality of this mixture is its capacity to retain nutrients. If this substrate is used in conjunction with an organic fertilizer (we recommend Top Crop or Plagron) grows will be considerably tall. This soil is formed with blonde peat, black peat, coco fiber and perlite. PH levels should range between 5.5 and 6.9 and the EC levels have to be between 0.7 and 1.1. Its mineral nutrients NPK composition is 12/14/24.

This soil will retain a lot more nutrients than other substrates. Your plants won’t need big amounts of fertilizers so that will be a saving. On the other hand it is easy to over-fertilize the weed plant, so you should be careful.

7L pot plant needed 1L of water a day during the flowering stage but fertilizers were only used every 3 days.

Janeco Light Mix (Atami)

This mixture isn’t as light as others as it contains some nutrients to help your plant with the first growing phases. Some growth liquid will still necessary, though .If you don’t fertilize your plant with anything else during the entire process, it will end up lacking nutrients. As far as humidity retention goes, this soil is in between BioBizz light mix and Canna’s professional terra. It doesn’t retain much water but it’s not too dry. It’s the preferred option for those who check on their plants every day and water them if needs be.

When using this type of soil, a 7L pot plant needed 1L of water every 36-48h.

Super Soil for Weed

Super soils is a type of soil that some growers prepare themselves to give the plant what it needs at the right moment, including all the nutrients and the right PH levels. This soil is 100% organic and is meant to replicate rich soils naturally found in nature. Some growers reckon this is the best soil for growing weed.

Creating your own super soil is harder, more expensive and more time consuming than buying store products. Obviously, the results are very rewarding and your cannabis plants will surely appreciate it.

Good quality super soil needs to have five ingredients: minerals, organic material matter, living organisms, gas and water. It also needs to be rich in Nitrogen, Potassium and Phosphorus.

Some super soil recommended organic amendments would be bone meal, worm castings, wood ash and compost.

Super soil can be reused at least three or four times given the right care. Some purists believe that the more you use it the better it gets and that it would only need some re-ammending after each season.

See also  Pickerel Weed Seeds

As shown above, substrates have different qualities and it’s hard to decide which is the best soil for weed. You just have to choose the one that best adapt to your grows.

Hopefully thanks to this article, making the right choice will be an easier task.

You’ll find more tips and advice on how to grow cannabis in our blog and our YouTube Channel. Please don’t hesitate to check them out.

Best Soil For Marijuana Seeds

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100% Pure Worm Castings – All Natural Soil Supplement in 5 lb., 12 lb., and 25 lb. bags ideal for gardens, planters and lawns.

Buy in bulk for crops, lawns, or large garden beds – we have 1,000 lb., 1 ton and bundles available for any size job.

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.

See also  Weed Seed For Sale In Jamaica

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.

Best Soil For Growing Weed Indoors

If you have an indoor cannabis grow set-up, you need the best soil for growing weed indoors. Our cannabis soil guide dives deep into the factors to consider when shopping for soil for pot plants including its drainage, water retention, and texture.

In addition, we list our favorite potting soil products for cannabis, so you can grow big and bountiful yields time after time.

Choosing the Best Soil for Indoor Cannabis Gardens

When shopping for the best potting soil for cannabis, there are few factors to consider. First, how many plants are you intending to grow? This will help determine the amount of soil you will need.

Above all, you want soil with plenty of nutrients, proper drainage, and good water retention. Here are some factors to consider when buying the best potting soil for weed.

Texture

The best soil for growing weed indoors includes an optimum mixture of silt, sand, and clay soil, known as loamy soil. Ideally, the mix should have about 40% silt, 20% sand, and 40% clay.

Make sure your plants get a loose and light soil texture to help with root growth and ensure oxygen gets to your roots.

Drainage

Cannabis potting soil requires proper soil drainage. When watered, the soil should not hold the water too much to where it pools on the top. If you have bad drainage, your plants can be vulnerable to root rot and mold.

Water Retention

While you want soil with proper drainage, you also don’t want the water to completely flush through without allowing the roots to take in water and nutrients.

Water retention refers to your soils ability to hold water. The best soil for growing pot indoors has balanced drainage and water retention properties.

PH refers to how alkaline or acidic solution is. Cannabis thrives in a soil pH range between 5.5 and 6.5. Deviating slightly from this range won’t cause too much damage but if it goes well beyond the range, you can get stunted growth, lower yields, and dead plants.

Nutrients

Nutrients are your cannabis plants life force. Most ready-to-use and organic soil mix for weed is packed with nutrients for your cannabis.

Keep in mind, the nutrients in your soil mix don’t last forever. At most, they can last a few weeks and require you to keep a close eye on any nutritional deficiencies or signs of overfeeding.

Best Soil for Growing Weed Indoors

1. FoxFarm Happy Frog Potting Soil

FoxFarm’s Happy Frog Potting Soil is ready-to-use for indoor and outdoor applications. Happy Frog potting soil features soil microbes such as mycorrhizae and humic acid to improve root growth and nutrient uptake.

Other goodies include bat guano, aged forest products, and earthworm castings. Keep in mind, this soil is designed for container planting.

Learn How To Grow Cannabis!

2. FoxFarm Ocean Forest Potting Soil

FoxFarm’s Ocean Forest Potting Soil features a robust blend of ingredients from the “earth and sea.” Its powerful ingredients include fish emulsion, aged forest products, earthworm castings, crab meal, and sphagnum peat moss.

Its sandy loam, aged forest products, and sphagnum peat moss give this soil a properly aerated texture that is sure to improve nutrient uptake. This soil is also designed for container use.

3. Super Soil Organic Concentrate

From Nature’s Living Soil, the Super Soil Original Organic Concentrate comes in a 1, 5, or 10 lb. bag. All you need to do is add your preferred organic potting media to complete your mix. It contains all organic ingredients that your plant will need to thrive.

Full of helpful microorganisms and fungi, this concentrate can produce the best-looking and tasting buds around. Ingredients include organic earthworm castings, bat guano, blood meal, bone meal, azomite, epsom salt, coconut water powder, kelp meal, alfalfa meal, and so much more.

4. FoxFarm Coco Loco Potting Mix

FoxFarm’s Bush Doctor Coco Loco is a coconut coir potting mix meant to recreate the tropical jungle floor. Light and airy, it does this by incorporating layers of exotic coconut palm humus which can hold more than its weight in water while still retaining great drainage characteristics.

Its ability to hold onto water will mean you wont need to water your garden as often. Water every few days for best results.

5. Big Rootz All-Purpose Potting Soil

Big Rootz’s All-Purpose Potting Soil features a professional-grade composition at a budget-friendly price. This cheap soil for growing weed is meant for indoors or outdoor gardens and has been Certified Green Clean (CGC).

A team of weed growers developed this high-quality formula that combines rapid-release amendments with medium and slow release for an optimal performance.

6. Roots Organics Rod Original Potting Soil

Roots Organics Original Potting Soil is ready-to-use for your indoor garden. Its formula is perfectly designed for aeration and water retention so you can feed your plants frequently for fast growth.

Plus, the soil bags can be used as pots. Simply cut off the top, add in your plant, and you’re set. Ingredients include coco fiber, perlite, peat moss, pumice, composted forest material, bat guano, worm castings, fish bone meal, and much more.

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