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Choosing the best soil for growing weed

Apr 26, 2020
Growing Medium

Choosing the Best Soil to Grow Marijuana

Beginner growers may look into buying specialty soil to try to get better results if they even think about the soil they’re using for the cannabis plants. While marijuana will grow in most soils, it won’t do as well if there aren’t sufficient nutrients. The plant can even die if there aren’t any nutrients, if the water can’t drain properly, or if the water drains too fast.

When it comes to soil, there are tons of options available. Beginner growers don’t have to spend a lot of money to pick out soil that’s going to be good for their plants. Plus, with a little extra knowledge and a few extra supplies, they can create soil that’s better than what can be purchased in stores, and that’s going to have everything marijuana plants from bruce banner or banana kush seeds need to grow large and healthy. Read below to learn more about soil for marijuana plants and how to make sure the best soil is used.

The Right Soil is Very Important

Soil is just dirt, so why is it so important? Marijuana plants, like all other plants, need soil to grow, along with light and water. Although there are options like hydroponics that don’t require soil, using soil is an inexpensive way for beginners to get started and can be an excellent way to grow marijuana to ensure the healthiest plants and highest yields.

Many beginners will purchase soil at the store, buying whatever bag is on sale or looks like it would be a good option, or will use the soil they already have outdoors. This is fine, and in most cases, will support a growing marijuana plant. However, it’s not going to contribute to a higher yield, and there could be issues with a lack of nutrients that means the plant isn’t as healthy as it could be. Even if it seems to grow fine, the marijuana obtained from the plant may not have a high THC level or may not be as much as the grower could have received if they used better soil. This can be true even when you start with the highest thc seeds, since the lacking nutrients won’t allow the plat to reach its full potential.

When it comes to using outdoor soil, there could be hidden dangers. Diseases can be present in the soil that are undetectable until the plant starts to show symptoms. At this point, it may be too late to save the plant, and the grow room will need to be sanitized to prevent the disease in the future, even if new soil is purchased. Outdoor soil can also include small microorganisms and other pests that are difficult to detect, but that can destroy the marijuana plants. It’s best to sanitize any outdoor soil that’s going to be used for marijuana plants inside, but that does destroy the nutrients in the soil, so extra care is needed to ensure the plants have everything they need. I49 seed bank USA also offers a wide selection of mold resistant cannabis strains that can help mitigate these issues, but you should certainly still start ever new crop with fresh sterile soil.

The Components that Make Up Soil

Soil is not, as mentioned, just dirt. It has many components inside it, whether it’s purchased from the store or obtained from the backyard. Most natural soils consist of air, water, organic matter, small organisms, and minerals.

  • Air – Air is found inside the soil and is crucial. Plants do need to be able to get nutrients or water from the soil, and the air makes it possible for the roots to move around and reach what they need. If the water is lower in the soil, for instance, the air in the soil makes room for the roots to grow down, reaching the water.
  • Water – Water is crucial for plants, but it’s not just plain water in the dirt. It’s mixed with dissolved salts and other chemicals that are found in the soil. Soil should be around 25% water, so it should be moist but not soaking wet. When there is too little water, plants can’t get the nutrients they need. When there is too much water, plants can drown.
  • Clay – Clay makes up part of the actual soil, and it includes many essential nutrients. While it is necessary to have some clay in the soil, it’s important to avoid soil that has too much. Clay has little air in it, so it will be hard to work with, and the soil will not drain very well if there is too much clay.
  • Sand – Sand is also found in soil, and it doesn’t contain any nutrients that the plant can use. The sand does, however, separate the clay to provide better drainage. As with clay, too much can be bad for the plants. If there is too much sand in the soil, there won’t be enough nutrients for the plants, and the soil will drain too fast.
  • Silt – Silt consists of sand and minerals. In most cases, silt will provide some nutrients for the plant, but it doesn’t have much. There should be a small amount of silt in the soil.
  • Organic Matter – A lot of soil is made up of organic matter. This includes decomposing plant and animal particles, like in compost, as well as organisms and microorganisms that live inside the soil. It also includes substances produced by the roots of plants, which is why companion planting can help provide marijuana plants with added nutrients.

Knowing What Good Soil Is

Knowing the components of soil is crucial, but how can you recognize when soil is good? The definition of good soil can be different depending on the type of plant growing. Marijuana, for instance, has certain requirements to make sure it’s going to get the most from the soil. When buying soil for growing marijuana from i49 seeds, look for the following.

  • Dark and Loose – The soil should be a dark color, which helps indicate that there are plenty of nutrients in the soil ready for the marijuana plant to use. The soil should be loose, which means it doesn’t clump up, but it should not be as loose as sand, either.
  • Good Drainage – When water is poured onto the soil, it should drain through the soil quickly. However, the soil shouldn’t let all of the water run through as it should retain some of it for the plants.
  • Good Water Retention – When water is poured on the soil, while much of it should drain through, the soil should retain some water. The goal is to have the water end up moist, not soaking wet or dry. To test this, hold a little bit of soil and pour water on it. Once it has drained, try to squish it into a ball. If it holds its shape, it is retaining water.
  • Organic Matter – Marijuana plants require a lot of nutrients, so any soil used will need to include organic matter. Organic matter can include castings, blood or bone meal, guano, coco coir, perlite, and other ingredients. This gives plants the best start, but nutrients will need to be added as the plant continues to grow to ensure it has everything it needs.

Choosing the Best Soil for Marijuana

Finding the right soil isn’t always as easy as it sounds. There are different soil needs for plants depending on the life stage of the plant. In the very beginning, seedlings should be in peat plugs or similar material to ensure they can grow unobstructed. Peat plugs and organic potting soil are perfect for the smallest marijuana plants because they contain everything the seedlings need to grow. It is important to remember, however, that the seedlings will need to be transplanted to a better soil when they’re around a month old. At this point, they need more nutrients than the potting soil will offer, and they require better soil that can handle the root growth and other needs of the marijuana plant.

When your cannabis seeds have sprouted to sufficient size and are ready to transplant, there are a few options. Using the soil outside is one option, as it’s easy just to add the peat plug to the soil outside and allow the plant to grow. The peat plugs do add to the soil already existing outside by increasing the nutrients in the existing soil and providing room for the plant’s roots to continue growing. For growing indoor cannabis, however, it’s best to look into different types of soil created specifically for growing marijuana.

The two main options for indoor growth are sterilized potting compost or a living soil. Sterilized soil should be amended with something like perlite to help increase the air content of the soil. This will help your og kush or white widow marijuana plants grow a lot faster. Living soils are created from compost and include microorganisms that can help the plants grow. Marijuana plants can absorb nutrients created from microorganisms, which allows them to grow faster and healthier. When using living soil, it’s best to repot your purple tropicana or blue ice weed plants again just before the flowering stage starts to ensure the plant continues to have sufficient nutrients at that stage of its life cycle.

Buying Soil from the Store

Store-bought soil can be used to grow marijuana, but it’s important to be careful when choosing the right one. Marijuana plants require different nutrients during different stages of their life cycle, so avoid any potting soil that includes time-release chemicals. These are especially risky for very young plants, as the mmj seed itself contains the stored nutrients needed for the first few days of germination. Look for soil that is dark and rich to ensure it has the right water levels and the right amount of drainage. Other options besides potting soil can include organic compost. High-quality fertilizer created from cow and pig manure can be mixed with half sand to create an amazing soil that has all of the nutrients marijuana plants require.

Improving the Soil You Already Have

The best time to think about the soil is before starting seedlings, as this gives more chance to prepare and find the best soil to use. However, there are ways to improve soil that might already be around the house, whether that’s potting soil or some of the topsoil from outside. Some of the ingredients to add include the following.

  • Coco Coir – Coco coir is made from coconuts and can help with water retention without making the soil heavier. It can also help with the development of roots for marijuana plants.
  • Perlite – Perlite is made from rocks that can add oxygen to the soil and increase how well the soil drains. It can also help protect against nutrient burn.
  • Vermiculite – Vermiculite helps to lighten the soil as well as with water retention. It can be combined with perlite to help with both water retention and drainage, but they should not be combined in equal amounts in the soil.
  • Worm Castings – Worm castings can help with water retention and drainage as well as improve the texture of the soil. It also includes a ton of nutrients that are great for marijuana plants.

Creating the Best Soil for Cannabis Plants

Not ready to grow yet? Then there’s plenty of time to start making homemade soil, also known as “super soil.” Super soil is designed for marijuana and includes everything that your marijuana plant might need, so there’s no need to worry about adding nutrients. However, it does take a lot of time to create, so most growers aren’t going to want to jump in and get started with creating super soil. It is possible to have super soil being processed while growing other plants, so there are still plants growing while you wait for the super soil to be ready.

Super soil is created by adding slow-release nutrients to the soil, then composting it. To create the super soil, the composting process will take at least a few months. This creates a living soil that will include the microorganisms beneficial to marijuana plant growth. Once a grower starts using super soil, they can keep a continuous supply being processed, so there is always some they can use.

Soil is a lot more involved than just the dirt found outside. Though the soil outside may be great for growing the cheap marijuana seeds for sale at, it may also lack a lot of what marijuana plants need to grow healthy and strong, and to produce the best buds. The information here should help you recognize soil that is great for growing marijuana, as well as help you determine how to add to the soil you have to create the best option for your plants. With the right added ingredients, marijuana is going to grow faster and produce a higher yield of better-tasting marijuana.

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