Good Soil For Weed Seeds

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Prepping the soil for an outdoor cannabis garden makes all the difference. Learn about the small details that make a high-quality harvest. 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  Germinating Marijuana Seeds In Jiffy Pots

Best Soil for an Outdoor Cannabis Garden

Correctly preparing the soil for an outdoor cannabis garden can make all the difference to the quality and size of your eventual harvest. Cannabis has specific requirements in terms of soil quality and texture. Here is a brief guide to ensuring all variables are optimized.

Choosing the best soil for cannabis means monitoring soil acidity, texture and pathogens or pests inherent in soil. Making your own soil or purchasing sterile soil gives you full control over the acidity, nutritional content and texture of the soil. At the same time, planting in the ground exposes cannabis plants to the entire living organism that is soil — and this is very difficult to create in a pot.

In any case, the growing medium is fundamental to the grow itself as well as the final harvest. Having well prepared soil can help a grower mitigate problems throughout the grow. Theoretically, if soil is well nourished, the plant should thrive with little intervention. A healthy plant necessarily starts with great soil, and without the optimum soil for growing cannabis, you will never be able to bring about an optimum harvest.

Soil texture and composition for outdoor soil

The best soil texture for cannabis is light, loamy soil that drain swell but also retains a degree of moisture. Loamy soils are a mixture of sand, silt and clay in an approximately 40:40:20 ratio:

  1. Sand is a major constituent of many soils, and is characterized by granular particles of rocks and minerals that measure 0.05mm to 2mm in diameter.
  2. Silt is finer than sand, and consists of particles measuring 0.002mm-0.05mm.
  3. Clay is finer still, and its particles measure less than 0.002mm in diameter.

One method of determining soil composition involves shaking soil in a jar full of water and allowing the particles to settle; a more detailed explanation can be found here.

The smaller the average particle size in soil, the harder it is for water to travel through it. You can think of it like a coffee machine. If you pack the coffee into the wand too tight, it’s near impossible for the water to come filtering through. By the same principle, sandy soils have very quick water drainage, while soils with high clay content become waterlogged easily.

If you’re using natural local soil, you can mix extra sand, silt or clay into it to improve its soil draining or retaining capabilities as needed. Drainage and soil stability may also be improved by adding gravel, which in technical terms is rock and mineral particles measuring 2m-75mm in diameter. Larger rocks can be removed where possible to avoid causing obstruction to the roots of plants.

If soil is poor, you may wish to consider buying good-quality commercial soil and mixing it into existing soil. You can also add manure, mulch, bloodmeal, bonemeal, or a range of other soil additives designed to improve nutrition release. You can even grow your plants entirely in bought commercial soil, in bags or pots so that they are not exposed to local soil.

Regulating pH of soil for growing outdoors

The optimum pH range for cannabis is between 5.5 and 6.5, making it slightly acidic. If soils are more acidic or alkaline than this, a range of deficiencies or toxicities can result. Soil that is too acidic or too alkaline disturbs a plant’s ability to absorb and use nutrients. If nutrients are not taken up in optimum ratios and quantities, your plants will not achieve the maximum quality and yield, your final harvest will suffer as a result.

Soil pH can be adjusted with a pH regulator. This is usually a solution that can be purchased from any gardening store. The most commonly used ingredient to lower pH (make it more acidic) is sulphur. Sulphur reacts with specialized bacteria commonly found in soil to create sulphuric acid, therefore acidifying the soil.

To increase pH, agricultural lime is usually added to soil. However, it isn’t necessary for cannabis cultivators to purchase sulphur or lime. These are usually available in solution at garden stores. A thorough guide to adjusting pH can be found here.

Remember that before you add a pH regulator to your soil, you first must know the current pH of your soil. This is measured with a soil pH meter. It can also be purchased from your garden store. You should only add pH regulator to your soil once you know the current state of acidity.

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How to Choose the Best Outdoor Cannabis Strain

Sterilizing your outdoor soil

Sterilizing your soil by exposing it to steam can kill off many harmful bacteria, fungi and insects, while allowing several beneficial bacteria to remain alive. If purchasing good-quality commercial soil intended for growing cannabis, it is usually unnecessary to sterilize soil. However, if using local, natural soil, it may be helpful to sterilize where possible. It may also bring the added advantage of killing off any unwanted weed seeds present in the soil.

Sterilizing is a difficult and time-consuming process that is often overlooked though. If it’s not feasible to conduct this step, there are other ways to control pests. You can introduce beneficial microbes and insects to soil, as well as organic, plant-based compounds that repel or kill pests without harming the plant.

There are various techniques for sterilizing outdoor soil. Solarization is one method, and involves thoroughly tilling the soil so that it is broken up into fine pieces, watering and covering with a sheet of clear plastic.

The sheet of plastic amplifies the heat and light of the sun and allows the soil to reach high enough temperatures to kill off most undesirable microorganisms. Soil must reach temperatures of 46°C (114°F) for four to six weeks to be fully effective. It should be checked and re-tilled regularly to ensure that temperatures are sufficient and consistent.

If soil solarization is not possible due to time constraints, it may be possible to sterilize your soil by using steam. Large-scale agricultural operations make use of expensive, specialized equipment, but it is possible to use cheaper household sources of steam such as a pressure cooker to sterilize soil.

There are also methods that have been designed for smaller-scale grow operations. For example, the Hoddesdon grid method is a technique that involves layering tilled loam on a steel grid over a shallow pan of constantly-boiling water so that steam can rise through it. When temperatures reach 82-88°C (180-190°F) throughout the soil, sterilization is complete.

Growing outdoors: Pots, bags, or holes in the ground?

When growing outdoors, there are several options available: grow your plants in pots or planters, keep them in growing bags (which may be the plastic sack your commercial soil was purchased in, or may be specially-designed bags that are typically made of hessian or breathable plastic). You can also dig holes in the ground and plant directly into the soil. Outdoor soil can be optimized using the methods outlined above, or use without modification if testing shows it to be naturally optimized for growing cannabis.

If growing in pots or bags, you have the advantage of using commercially-bought soil which is not only optimized for growing cannabis but pre-sterilized to ensure that no harmful microbes are present. The downside is that your plants will be constricted by the size of their container. Pots may also require regular transplants as well as water (which they cannot receive from groundwater as plants in permeable bags or holes in the ground can).

See also  Growing Weed From Seed

On the other hand, digging holes in the ground and planting your young plants straight into the soil allows them to grow without constraint, and will allow roots to access the maximum amount of groundwater. Thus, they will achieve larger sizes and will require less vigilant maintenance, but may be at increased risk of exposure to soil pathogens and even contamination from agricultural run-off, for example.

Choosing the best soil for cannabis is often not as complicated as growers make it out to be. This is especially true for those who are just beginning to grow cannabis, and are not particularly concerned with yielding specific amounts of specific cannabinoids. Cannabis grows almost everywhere, and is known to grow in wet soil next to riverbeds as well as on rocky mountainsides. Well-nourished soil with the correct texture and pH is the best starting point, after which many adjustments can be made throughout the grow using nutrients and pH regulator.

Watch your plants throughout the grow, and adjust the soil as need be. Growing cannabis is a learning process that requires time and patience, and the best things are learned on the job!

Laws and regulations regarding cannabis cultivation differ from country to country. Sensi Seeds therefore strongly advises you to check your local laws and regulations. Do not act in conflict with the law.

Good Soil For Weed 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.

See also  Mango Seed Weed

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.

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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