The 10 Best Soil for Cannabis Indoor – Potting Soil, Organic Soil, Mix Soil Reviews 2021

If you’re looking to grow cannabis indoors, then one of the most forgiving ways to do so, especially for beginners, is in soil (rather than hydroponic substrates that can be way more challenging and costly to set up). With soil you are also guaranteed to provide a deeper flavor to your buds, so its an important factor to consider for those that like aromatic and tasty products. However, if you’ve decided soil is the answer how do you figure out how to find the soil the best for your needs?
To help you out, here are the busted for ordering seeds that work
Below we outline some of the key considerations you will need to make to help you pick the best soil and some of our highly recommended soils that will produce the tastiest plants without you having to be an expert in pedology!

What soil is good for growing Cannabis?

The 3 key things you want from soil that will ensure you grow healthy plants are: decent texture; good drainage; and water retention. Without a loose enough texture, your plants won’t be able to develop strong roots. Without good drainage, you will end up over watering your plants and starving them of oxygen, causing them to wilt. And, conversely, without good water retention, your roots will dry out quickly and become damaged.

What does “Good” Cannabis soil look like?

A good soil will usually look nice and dark, like used coffee grounds and a loose but sandy texture that will help it retain enough water without suffocating the plant of oxygen, as a soil full of clay or packed mud balls from the garden would do. More specifically, you will need to pick a soil suitable for your cannabis strain, as some auto-flowering strains will need a different recipe all-together in comparison to their photo-period counterparts.

What makes the best soil mix for weed?

If you are growing auto-flowering strains, then you will want soil that is not heavily fertilized. It is also a good idea to mix 50% soil with a combination of 50% of coco coir (made from coconut husks – helps with water retention) and a peat-based soil with plenty of perlite (light and airy rocks – helps with drainage) to ensure good drainage. You also want to take it steady with fertilizers in the early stages whatever the strain, give your seedlings some time to grow first.

Top 10 Best Soil for Cannabis Indoor 2021

#1 (Editor’s Choice – Best Potting Soil) FoxFarm FX14047 (2 Cubic Feet)

A firm favorite among experienced cannabis growers FoxFarm is a brand you can trust. So it is no surprise that their Happy Frog Potting Soil comes in at our number one spot in the best soil for indoor cannabis growing. As your plants are growing inside, and will not be receiving nutrients from the ground, this potting soil has been adapted to provide all of the benefits from growing outside inside so your plants don’t suffer.
Containing a combination of microbes and fungi to feed your plant (including earthworm castings and forest humus). It is also automatically adapted to be at the correct pH level for your plants so that they can make the most of this delicious soil as this maximizes their ability to absorb the nutrients.
With this number one choice of soil for indoor cannabis growing you will enjoy seeing your plants grow strong and prosperous with an abundance of flowers and buds.

#2 (Best Organic Super Soil) Nature’s Living Soil 25 Gallons(3.9 Cubic Feet)

Any review of soil for the indoors would not be complete without a super soil, and this product is one of the best available on the market. The key thing to remember with this soil is that once you’ve planted your seeds you won’t have to add any additional fertilizers as it is packed full of microorganisms which will produce everything you need, just by adding water.
You will need to add some potting soil with this product though as it is a concentrated variety, but once you’ve done that you’re off and you’ll soon see fantastic results when planting photo-period strains.

#3 (Best Potting Soil Bags) FoxFarm FX14000 (3 Cubic Feet)

This superb soil is designed for plants grown indoors inside containers, making it a great option for weed growers with a small grow-room or grow-tent. With pH adjusted soil, you’ll get the most out of the fertilizers you use to help boost growth. This, combined with the guano, worm castings, and aged forest products found in this soil, also means your plant will get all the nutrients it needs in the confines of its pot. You’ll soon be growing some of the tastiest pot around.

#4 (Best Soil Mix) Fox Farm Coco Loco (2 Cubic Feet)

This Coco Loco soil mix can be used when you are planting from seed as it doesn’t get too ‘hot’ as some nutrient heavy potting soils do. Some growers recommend a mix of this and the Happy Frog potting soil (our Editor’s Choice reviewed above) for the ultimate perfect environment for your cannabis plants. It has a good water retention for the plants and offers nutrients and water to your weed when it needs it. A trustworthy soil mix from a top brand.

#5 (Best Coco And Perlite Mix) Mother Earth Coco Plus 50L(1.8 Cubic Feet)

Although not strictly speaking soil, this mix provides two fundamental components to creating the perfect soil mix for your weed plants, especially if combined with the highly recommended soil mix above. This plentiful bag allows you to really play around with creating the best soil possible in terms of texture, retention, and drainage so you can really get to grips with growing the tastiest weed indoors, with only 100% natural products.

#6 (Best Soil Mix Organic): Big Rootz (1.5 Cubic Feet)

Created by expert cannabis growers this excellent soil mix from Big Rootz is a great choice for beginner indoor cannabis growers. This soil is pH adjusted for you so that your plants get the maximum intake of water and nutrients to make them grow strong and productive. It also contains the essential ingredients that weed plants love – a combination of peat, worm casting, compost, and coir. It is also completely organic which is another bonus.

#7 (Best Organic Soil) Roots Organics Rod (1.5 Cubic Feet)

An environmentally friendly choice is this potting soil from roots organic. It is designed to be used for cannabis plants that are beyond the seedling stage, this is because it is so nutrient heavy. This is a super nutrient-rich soil, which includes organic matter that weed plants love such as fishbone, feather meal, glacial rock dust, worm castings, humic acid, and bat guano. It also comes in a ready-to-use pot so you can transfer your plants immediately.

#8 (Best for Growing Auto-flowering) Miracle-Gro 16-Quart(0.6 Cubic Feet)

If you are a beginner at growing and want some soil that is ready to go and will feed your plants continuously, even if you forget to, then this potting mix will be a great choice. Packed full of organic substances and the Miracle-Gro plant food that will gradually release its goodness over three months, this soil works great with auto-flowering plants. You’ll still need to provide added NPK fertilizers at different stages of the cannabis life-cycle, but thankfully this mix will give you some leeway if you can be a forgetful gardener.

#9 (Best Soil for Seedlings) Espoma SS8 8-Quart(0.3 Cubic Feet)

If you are the sort of person that want to nourish your plants from seedling through to the harvesting phase, with exactly the soil they need from the beginning, then this organic Seed Starter pack is great value. It has superb nutrition for early phase growth, just make sure you are sure of your re-potting skills as you will want to start off in small pots with this smaller, but more nutritious, bag of soil. With perlite, peat moss and peat humus as well as nutrients that ensure strong root growth, you’ll love the boost this soil gives your seeds.

#10 (Best Organic Potting Soil) Black Gold 1302040 8-Quart(0.3 Cubic Feet)

If you are looking for an organic potting soil for your indoor weed garden then this product from Black Gold is a sensible choice, and a popular choice with your fellow cannabis connoisseurs. This potting soil will create a great base for your plants and thanks to its rich and lucrative soil mix, and is a good option for those of you who want to be a bit more ‘hands on’ with your growing as it will require some additional nutrients to be added which you can choose and regulate.

Conclusion

When growing cannabis indoors a great way to help with the success of your crop is to grow it in soil – this will help your plants to flourish as well as giving the product a lovely flavor. As you can see from this article, there are plenty of soil mixes on the market that have the correct mixture of nutrients to make sure your plants get what they need to prosper. So grab your grow bag and get growing!