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The Best DIY Soil Mix Recipe

February 8, 2016 by Tiffany Davis 33 Comments

The best DIY soil mix recipe has been a long time in the making. This DIY soil mix isn’t just something I threw together on a whim and hoped it worked; I spent a lot of tireless hours researching this! I love this soil as a DIY potting soil and for my Square Foot Garden Boxes.

I’ve been using a combination of Mel’s Mix and potting soil on our little homesteading; and the results haven’t been horrible. But I wanted to take our garden to the next level. I wanted a DIY soil mix that would hold moisture, be full of rich nutrition, be lighter (less compaction) and more sustainable. The result is the best DIY soil mix recipe around!

DIY Potting Soil Mix or Raised Bed Soil

The Best DIY Soil Mix Recipe

DIY Potting Soil and Raised Bed Recipe
I mixed mine up in a wheel barrow this time but this makes mixing a lot harder.  It would be better to do this on a thick tarp.

10 gallons of coconut coir  (What I used)
5 gallons of sifted compost (Hopefully you’re composting at home)
2 gallons of worm castings (what I used)
8 quarts of organic vermiculite (what I used)
5 cups of Azomite (what I used)

I like to mix in each ingredient at a time.

  1. So first I put down the coconut coir, then I added my sifted compost and used my hands to incorporate them together.
  2. I repeated that with the worm castings and vermiculite.
  3. Lastly I added the azomite (be careful not to breathe the dust in!)

The Best DIY Soil Mix for Pots & Raised Beds | by ImperfectlyHappy.comThe Best DIY Soil Mix for Pots & Raised Beds | by ImperfectlyHappy.comThe Best DIY Soil Mix for Pots & Raised Beds | by ImperfectlyHappy.com

 

 

 

 

Now it is ready for use or you can store it in a bin or bags.  I like to keep a top on it so it won’t get too dried out.

Check out this side by side comparison.  On the left is a popular store-bought raised bed soil and on the right is my mix.
DIY Soil

Now, let’s talk about the ingredients and why I included them

Ingredient 1 – Coconut Coir

Coconut coir is, first, a wonderful peat moss substitute.  Peat moss is not sustainable; we are mining and using it at such a high rate coconut coir that it cannot renew before we run out. Coconut coir is leftover from the coconut industry, that was thrown away. What coconut coir does is add a spongy quality that it going to help your soil retain moisture (it can hold 10x its weight in water). It doesn’t clump and will not degrade in your soil as quickly as peat moss either. It will as a dried brick and you’ll need to soak this in some water to re-hydrate it. If you have coconut coir left over, don’t throw it away!  Just store it for the next time you make your DIY soil mix. I soak mine in a tub and break it up a little as I go.

Ingredient 2 – Worm Castings

Worm castings are an amazing natural fertilizer. What’s great, too, is that plants soak up its nutrients quickly so it can stimulate growth better than any manure or chemical fertilizer. It can even help a plant fight off diseases by drawing out toxins. Worm castings also improve the texture of the soil, help to increase drought resistance AND it promotes good microbial activity.  The best way to get this amazing additive is to be vermicomposting with your own little worms. But it isn’t a project I have going right now, so I opted to buy mine.

Ingredient 3 – Sifted Compost

I love compost – it is basically free soil, when you do it yourself. This fertile soil builder is a must have for homestead gardens. I like to sift mine because I don’t need “uncooked” materials continuing to break down and heat up the soil (120 degrees isn’t unheard of in Phoenix).

If you need some help getting started with compost check out Compost 101. If you decide to buy it, just make sure you’re getting it from a reputable supplier that is using organic materials without pesticides or other junk.

Ingredient 4 – Organic Vermiculite

Vermiculite helps keep soil from compacting but it also great for water retention. I live in a desert climate so I want to have ingredients that help my soil retain water. If you’re in a climate that gets a lot of rain you might want to consider perlite instead.  Both are great additives but vermiculite is more sponge-like. So depending on your climate, choose what suits your needs.

Ingredient 5 – Azomite

Azomite (pronounced ā-zō-mite) stands for A to Z Of Minerals Including Trace Elements. Azomite is going to give your soil a power punch of minerals. What’s great about Azomite is that it is a slow release. So while your compost and worm castings are giving the initial dose of good nutrients, Azomite is going to follow them. Also Azomite won’t burn you plants…even if you put a ton of it in there.

What’s even cooler is that Azomite has been shown to help gardeners to produce more fruits and vegetables (and bigger) per plant. And the minerals improve the nutrition for US!  Winner, winner, chicken dinner!

If you want to read more about Azomite check out Azomite.com

I hope my mix will help take your garden to the next level – I am using this in both my pots and raised bed.  It could also be a great amendment to already established beds.

Happy gardening my friends!

More Soil Helpers

HOW TO USE RABBIT POOP FERTILIZER FOR A BETTER GARDEN

HOW TO IMPROVE SOIL WITHOUT A COMPOST PILE

AWESOME SOIL AMENDMENTS FOR YOUR ORGANIC VEGETABLE GARDEN

HOW TO USE ORANGE PEELS FOR A BETTER GARDEN

 

Filed Under: Gardening

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Comments

  1. Adrienne says

    April 24, 2016 at 6:18 am

    I just have a couple of questions… How much does this DIY mix make… do you have a rough estimate? Is this being used in raised beds? If so, what size are they?

    Reply
    • Tiffany Davis says

      April 24, 2016 at 4:20 pm

      You know, I haven’t measured exactly but it fills up my wheelbarrow. I used the mix in my raised beds (4×4) and in my fabric pots.

      Reply
      • Audrey says

        February 16, 2018 at 11:59 am

        how deep are you 4×4 beds?

        Reply
        • Tiffany Davis says

          February 17, 2018 at 4:48 am

          Originally 6 inches but I am converting most of them to 12 inches deep now.

          Reply
          • Erica says

            May 3, 2018 at 3:11 am

            Would this mix work for self-watering (sub-irrigated) raised beds? I want to make sure roots get enough air as well as water and am not sure about using such a large proportion of coir to other ingredients? Your thoughts are welcome!

          • Tiffany Davis says

            May 3, 2018 at 5:03 am

            I haven’t used it in self-watering beds but you could lower the coir and mix in more compost.

          • Greg says

            August 17, 2019 at 10:43 am

            The recipe as posted is for the 6″ bed, is that correct?

  2. Steve Reiter says

    May 21, 2016 at 12:01 pm

    How do you measure a 10-gallon quantity? Do you use a 5-gallon Home depot bucket or similar, or is it more complicated than that? Thank you.

    Reply
    • Tiffany Davis says

      May 21, 2016 at 12:49 pm

      Yep, used my trusty 5 gallon orange buckets. 🙂

      Reply
  3. William C Ermatinger says

    January 14, 2017 at 9:38 pm

    How many bricks or pounds equal the gallons in your mix?

    Reply
    • Tiffany Davis says

      January 14, 2017 at 9:40 pm

      Do you mean of the coconut coir?

      Reply
      • Jacksie says

        March 26, 2017 at 9:32 pm

        Im wondering how much of the coconut coir do you buy to equal 10 gallons? Do you hydrate it first before you mix?

        Reply
        • Tiffany Davis says

          March 27, 2017 at 5:53 am

          You’ll need about 2 of the blocks and yes you’ll want to hydrate it before you make the mix.

          Reply
  4. David says

    March 28, 2017 at 10:05 pm

    There is some discussion as to whether peat moss is sustainable and coir is more expensive. Also, there is a tremendous amount of peat available. Have you seen the YouTube videos by Larry Hall on the rain gutter grow system and kiddie pool system using the grow pots? He also has videos on worms. He arrives to make gardening easier. He has a diy mix, self-watering systems, and low maintenance.

    Reply
  5. Kristina Hellmann says

    February 9, 2018 at 1:09 am

    So cool, love this. Thanks so much for sharing. Cheers.

    Reply
    • Kevdog says

      February 21, 2018 at 7:12 pm

      I’ve been using azomite for a few years and used to buy the micronized azomite for around $40 to $45 a bag. It’s actually a good value. Over time however I became concerned about the dust. I know purchase granular azomite which is a tad more expensive however there isn’t any dust so it makes me feel better. I also add in green sand, rock phosphate and either bone meal or bone char with coffee grounds. Most of the additives I’ve borrowed from a article or recipie from a peony farm located in New Hampshire. You may have to adjust pH depending on your area or adjust if you’re gardening in either sandy soil or clay soil. I unfortunately have a bunch of the clay crap with poor drainage. If worried about drainage I would substitute possibly perlite for vermiculite in your mix since I’m not living in a desert.

      Reply
  6. Angela Miller says

    March 23, 2018 at 2:03 am

    Thanks again Tiffany!

    Angela Miller

    Reply
  7. Pepper says

    September 4, 2018 at 5:18 pm

    Hi Tiffany,

    When you say to use compost, can composted manure count (such as cow) Have you ever tried that?

    Reply
    • Tiffany Davis says

      September 5, 2018 at 4:10 am

      Absolutely! I use rabbit manure, because that’s what I have readily available.

      Reply
  8. Joseph Shanabarger says

    October 25, 2018 at 2:51 pm

    Do you use biochar in any of your mix? That last for years and it keep getting better and better each year. Please email

    Reply
    • Tiffany Davis says

      October 26, 2018 at 4:55 am

      No, but I’ve definitely heard great things about it. I may need to up my soil game and try it!

      Reply
  9. Carol L says

    February 15, 2019 at 10:48 am

    Thank you for this great recipe. I’m planning a garden this coming summer, and don’t have much experience. i look forward to upping my soils health (never gardened here before) and having a nice garden.

    Reply
  10. Jamie says

    April 26, 2019 at 2:41 pm

    Thank you for this!! Do you know if altitude matters for soil mix? Do we need something more or less up higher?

    Reply
    • Tiffany Davis says

      April 28, 2019 at 4:22 am

      I am not well versed in altitude and soil. But plants and vegetables require nutrients based on what is or is not in your soil. If you are going to use this mix exclusively, say in pots or raised beds, it should do very well. If you’re mixing it into the ground as an amendment you may need to run a soil test to see what is needed.

      Reply
  11. Laurie says

    July 7, 2019 at 6:15 am

    I put my raised bed garden together in a bit of a hurry. I followed your mix but I didn’t add the worm castings or azomite. Can I add these now? Or what kind of fertilizer/amendments do I add moving forward throughout the growing season? I’m rather new to all of this. My raised bed garden has basil, tomatoes, bell peppers, cucumbers, and a few dill plants. Thank you!

    Reply
    • Tiffany Davis says

      July 7, 2019 at 7:47 pm

      Absolutely – but you might want to wait until you harvest everything in the bed and then add it in for the new plants. If you decide to add it now mix with some of the soil first and then add to the top. Azomite is so fine, if you just put it on the top, it will blow away.

      Reply

Trackbacks

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