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Jeremy mixing soil by hand in the early days of BuildASoil
Jeremy mixing soil by hand in the early days
A note from our founder

Thirteen years ago it was just me, a tarp, and a shovel in my garage in Colorado. I never thought we'd end up ranked right next to the biggest soil companies out there. Truth is, making soil wasn't even the goal when we started. But once we did, our only goal became making the best in the world.

Here's the part most companies skip: we mix the soil once, then let it rest at the perfect moisture so it can compost together. Once it has, we remix and re-moisten it before it ever hits a bag. Yes, it costs more, but you keep it forever, and the ingredients and the care it takes to do this right just cost more. We don't cut that corner.

So when an outside crew with zero ties to us tested the whole field and landed on the same thing we already knew, man, that hit different. We're still the little guys going up against the big corporations, and the fact that you discovered us is what keeps us stoked to do this.

Jeremy Silva Founder, BuildASoil
Independently ranked Tested by Know Before You Grow

Ranked #1 of 26 Bagged Soils Tested

Lab tested, grown out, and scored across nutrients, soil structure, and real plant performance. BuildASoil 3.0 took the top spot. See exactly why.

#1
Overall Ranking
26
Soils Tested
4
Scoring Categories
3rd
Party Tested
What the test measured
Soil Test
pH, EC, structure
Nutrients
NPK + micros
Grow-Out
Real plant results
Taste
Final fruit quality
A genuinely independent test

We had no involvement in this review. Know Before You Grow purchased our soil at retail, tested it alongside 25 competitors, and published their findings without our knowledge. We found out when the video went live. This wasn't a sponsorship, a partnership, or a paid placement. We didn't ask for it, and we didn't pay for it.

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See Why our 3.0 Recipe is different

BuildASoil isn't just mixed once. It's built over time to keep forever.

1 Bag can change everything.

  • Twice Mixed

    Each Small Batch is mixed once, composted and then mixed again prior to bagging.

  • Batch Tested

    Each Batch is lab tested to ensure quality

  • Quality Ingredients

    Each ingredient sourced and tested by BuildASoil so you can trust the quality.

  • Never Throw Away

    The soil is built with minerals and volcanic pumice to last a lifetime!

Verified grower reviews

Real Growers. Real Results.

Independent labs put us #1. Here's what the people actually growing in our soil have to say after a full season, multiple cycles, and years of running BuildASoil 3.0.

4.9 / 5 average
594
Verified reviews
93%
5-star ratings

Best Soil I've Used

This is truly one of the best soils I have ever used. I've used other soils but the blends that comprise this soil are top level and knowing what's in it makes all the difference when you are growing organic, and especially with living soil. I was worried that it might be too much for an autoflower but as you can see in the picture, that's not the case. Do NOT be afraid that this will burn your seedlings. You can pop seeds right from this soil. I highly recommend this to anyone who needs soil from pop to harvest.

Jennifer Mitchell
Verified Buyer 10+ years growing organic

Wow

I started my seeds directly into this 3.0 soil 8 weeks ago and transplanted into 20 gal plastic pots about 4 weeks after the seeds popped. I ran cover crop for about 8 weeks prior to transplanting. Was worried it would be too hot but I have had no issues with this run. I have used RO water only supplemented with gypsum, microbes, and a wetting agent. I am so happy I went organic. No need to water daily and overall so much less work and my plants have never looked so good. On top of these products working better than anything I have tried before, the customer service this company provides is unbelievable. I'd give these guys 1000 stars!

WesP
Verified Buyer 3rd year grower

So easy

I don't know much about potting soil or gardening in general. But after reading up on what living soil is, it made sense to go with BuildASoil 3.0 because I wanted something that I can just water and walk away. And this was exactly it. The only detail I needed to be worried about was making sure my PH of my water was in a rough ball park of where I needed to be (thanks microbes!). I grew the best basil I've ever had in my life and it's 100% organic.

M.B.
Verified Buyer First-year grower

BEST POTTING SOIL HANDS DOWN!

I was skeptical to try BuildASoil for a while, but after pulling the trigger and just going for it I can say without a doubt it is the BEST potting soil straight from a bag I have ever used. I have the healthiest plants I've ever had from seed, and with straw mulch and a cover crop with Kashi gold and Rootwise you cannot go wrong. Everything this company sells is no frill no fuss and only what you need to maximize your gardens potential. All you gotta do is follow the instructions and let nature do the rest!

Curtis Majeskie
Verified Buyer 1-4 years growing organic

95 cubic feet later... it's the best

I have set up 3x1.5, 3x3, 4x4, and 4x8 living soil beds with the BAS 3.0 soil. Most are now on their 4th cycle and the soil is as soft and healthy as it was when I first filled them. In fact the flowers are better every time and all I do is give them RO water, 3 teas per cycle and weekly BAS aloe and/or coco foliars until chunking. I couldn't be happier with the results. Just go for it!

Big Crude
Verified Buyer 10+ years growing organic

Very Nice Results

First impression after opening the bag was that the soil had a nice look and texture and a rich earthy smell. Was a little slow to kick into gear for the first week or two but once the microbial life got pumping things really started to get moving along. Rapid healthy growth during end of veg and through flower. Good results with mostly water only. Flower end product turned out excellent. Recycled and reusing this soil still with just a little reamending and it's good to go for more cycles. Very good soil, highly recommended.

Andy Blank
Verified Buyer 10+ years growing organic

Excellent!

Some of the best soil I've used. The growth of my plants is much faster than other soils I've used. The best part is it's reusable without having to amend every grow. I'm on the third round of just using a top dress and compost tea every 1-2 weeks and everything is looking great. I've tried reusing others but always run into nutrient deficiencies in flower. I highly recommend this soil.

Codey
Verified Buyer 4-7 years growing organic

My "go to" soil

Best results with the least amount of work. Allowed me to tinker in the amendments for the feeder roots if I wanted but it didn't need it one bit. As a disabled vet it takes a little extra effort on my part to get in there and get the work done, but it's very rewarding seeing what can be accomplished getting in there every day multiple times a day. Big beds or SIP are very easy tools to get awesome results and the 3.0 blend is just plug and play.

Michael Gleason
Verified Buyer 4-7 years growing organic

Well balanced potting soil

Great soil! I do love to mix up my own soil. Sometimes sourcing a good quality compost isn't easy, especially when you're picky about the inputs like I am. When I can't make my own soil, BAS 3.0 is what I use. My herbs love it. I have a 30 gallon pot of living soil that I mixed up using BAS reamend kit. In addition, I use a few earthboxes (SIP) no till style with BAS 3.0. I also use many of the other fine products they sell for my outdoor herb, veggie, and flower beds. Thank you BAS team.

Julie Cukrowicz
Verified Buyer Herbs, veggies & flowers

Best Soil For A New Living Soil Grower

I've grown all sorts of different ways from super soil in the bottom of holes in corn fields in the old days, to DWC, and I never felt as connected to a grow as this one using living soil. This 3.0 is perfect for someone wanting to start. Just get a big enough pot and bam, you're ready for your first run.

Corey Wolcott
Verified Buyer 4-7 years growing organic

Game Changer

I'm so stoked to grow in such an organic, sustainable way and without sacrificing quality. I found BuildASoil after moving into an apartment building with a trash valet. I had to rethink my grow and not throw out soil. Hydro was also out of the question and I didn't want to deal with an RO machine. The BuildASoil way is the only way. I grow one plant in a 2x3 and it's so satisfying and low maintenance. I've never had such good results with organics.

InSpace0123
Verified Buyer Apartment grower, 2x3 tent

Amazing Soil

Bought a couple bags of 3.0 because I wanted to try out living soil for the first time as I'm a newer grower! Was pretty much a water only run until I hit the flower stage and then I had to top dress (growing in 5 gallon fabric pots). Overall was really happy with the soil and how it performed. Packed with tons of nutrients and very high quality ingredients. You really can't go wrong with this soil!

Jacob
Verified Buyer First-year grower

Beautiful Soil! So excited

Beautiful, beautiful, beautiful soil. They say the smell of healthy soil should release endorphins, and let me tell you, this does. I went all out with my future grow, and BAS came through big time. BAS serves you every bit of information you could possibly need to grow award winning cannabis. For free. Guys, BAS wants you to succeed. Take advantage of their resources: schedules for watering, feeding, amendments. Get an idea what you're getting into and pull the trigger.

John Barbay
Verified Buyer 1-4 years growing organic

Great soil!

I'm new to growing and the BuildASoil 3.0 has been great so far! I'm running auto sour diesel in a 5 gallon fabric pot and she's loving this soil blend. I'd highly recommend this for any level of gardener. Super easy water only with everything your plants need.

Nathan Whalen
Verified Buyer First-year grower
3.0 + Craft Blend Bundle
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Independent Test · Documented Result

We won “Soil Wars.”
Not even close.

Virginia hemp farmer York River Cannabis grew identical plants in 11 different bagged soils, side-by-side, across an entire season. Twenty-one episodes of documented results. We didn’t sponsor it, didn’t pay for placement, and didn’t know about it ahead of time. Here’s how it ended.

🏆 Final Standings Season Complete

BuildASoil swept 1st and 2nd place.

Soil Wars — 11 bags of soil compared side by side
Watch the winner reveal — 11 bags, ranked
🥇
1st Place
BuildASoil 3.0
Recipe 3.0 Potting Soil
🥈
2nd Place
BuildASoil Light
Light Mix
All 11 soils tested in “Soil Wars”
🥇 BuildASoil 3.0 🥈 BuildASoil Light Fox Farm Ocean Forest Coast of Maine Stonington Coast of Maine Potting Soil Bio 365 Bio All Dirt Craft Organics Soil King Big Rootz HSH Organics Pro-Mix BK25 Cannabus DC

Eleven soils. One season. Identical plants in identical conditions. The results weren’t even close — and we didn’t pay a dollar to make it happen.

— The independent test that speaks for itself

This Soil Is Just Different

Quality Ingredients, Twice Mixed and Composted for weeks. This is real Living Soil....

Loved by real growers

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