Homemade Potting Soil Recipe (2024)

(Pssst. This post is from 2015. I’m not pregnant anymore.) 😉

I’m back from the dead.

Or at least that’s what it feels like, especially if dead = first trimester.

That’s right, there’ll be a new Prairie Kid on the homestead come October. (Pssst. This post is from 2015. I’m not pregnant anymore.)

The funny thing about me and the first trimester (actually, funny really isn’t the right word…) is that my personality pretty much completelychanges…

I go from this hyper-motivated, homesteading, business-running, gardening, cow-milking mama who loves life and loves activity, to someone who really doesn’t care about much of anything, can’t open the refrigerator without dry-heaving, and can barely get off the couch.

Soyeah, it’s safe to say there wasn’t much from-scratch cooking happening in my kitchen these last few months. Which explains the lack of recipes here on the blog. I don’t even want to tell you what I’ve been eating. It’s all-about survival-mode, baby…

BUT, I’m officially 14 weeks and I think I’ve finally turned the corner. And let me tell ya, I’m ready to roll off the couch and get back to being my hyper, dig-in-the-dirt, cooking-up-a-storm self.

And what better way to celebrate finally feeling better, than… homemade potting soil. Am I right?

I’ve always kinda cringed when I’ve thrown those green and yellow bags of potting soil in my shopping cart at the garden store. I figured there was a better way, but never took the time to figure it out… Until now.

Thankfully, my homemade potting soil recipe is pretty darn easy to throw together. And it’ll save you some $$ too.

Why These Ingredients for My Homemade Potting Soil Recipe?

Truthfully, mixing your own homemade potting soil recipe isn’t rocket science, and there are plenty of ways to make it happen. A good potting mix will:

  • Be firm enough to support the plant
  • Be light enough to allow air/water to flow with minimal compaction
  • Be free of weed seeds and potential pathogens

But here is why I chose the ingredients I did:

Coconut Coir: Many DIY potting mix recipes call for peat moss, but since there is so much debate regarding mining from peat bogs, I decided to steer clear of it and opt for coir instead. Coconut coir is a by-product of the coconut-processing industry, and is basically ground-up coconut husk fibers. It is a fantastic choice for soil-less potting mix, as it retains water beautifully. I got mine in a big brick, and had to soak it in water before it was ready to use. You can substitute it 1:1 for peat moss in potting soil recipes

Perlite: Perlite is a lightweight volcanic rock. It holds water and helps to aerate the soil and keep it from compacting. Some people also use vermiculite or plain ol’ coarse sand in place of perlite in homemade potting soil recipes, too.

Compost: Well, you know what compost is, so I really don’t have to explain this one. Compost adds nutrients to the soil and it’s usually pretty much free if you make it at home yourself. Just make sure to use finished compost to avoid “burning” your plants or introducing weed seeds into your pots. Also, I used the finest compost I could find in my pile– you may need to sift yours if you have chunky stuff. Worm castings are another great option here.

What about Dirt?

Sorry… I meant to say soil. (I always get at least one reader correcting me when I call it dirt instead of soil.) 😉 You can absolutely use regular ol’ soil in your potting mix, and many folks do. However, it’s advised to sterilize the soil first, to eliminate weeds and potential pathogens. This can be accomplished by baking the soil at 200 degrees in your oven.

Why didn’t I do this? Because I could only imagine the mess I’d make trying to bake 10 gallons of dirt (er… soil) inside my kitchen… It just didn’t sound like fun, so I opted for coconut coir instead. Also– using straight soil in your pots can open you up to issues with compaction. So, even if you *do* decide to use sterilized soil, make sure to add some sand or other lightener in there, too.

Homemade Potting Soil Recipe

(this post contains affiliate links)

*a “part” can be anything you like– a measuring cup, a coffee can, a five-gallon bucket, etc. It just depends on how much potting soil you want to make.

If your coir came in a block, you’ll need to hydrate it.

I did this by allowing the coir “brick” to sit in water until I was able to break it apart. I then added more water until it was easy to flake apart in my hands and very moist.

Next, mix the coir and compost. Add more water if you need too– I found it much easier to handle/mix if the mixture was damp.

Add in the perlite, give it a stir, and you’re ready to go!

Use your Homemade potting soil recipe like you would store-bought mix.

DIY Potting Soil Recipe Notes:

  • Keep in mind this recipe is super flexible and lends itself well to substitutions. In some of the other recipes I’ve seen, people substituted sterilized soil or peat moss for the coconut coir, vermiculite or coarse sand for the perlite, and all sorts of different fertilizers (kelp meal, bone meal, blood meal, worm castings) for the compost.
  • This stuff is mucho easier to mix if it’s damp.
  • How does it compare in price?I paid $15.96 for an 11-lb brick of coconut coir in Amazon and $16.70 for a bag (18-quarts) of perlite. My local garden stores are pretty dismal when it comes to specialty ingredients, so it was unlikely I could have found those things here. The compost was free.Considering I only used a fraction of my ingredients for my first batch, they should last me for a while… And if you substituted coarse sand or sterilized soil, this homemade potting soil recipe would be even cheaper.

More Gardening Tips:

  • 7 Simple Ways to Improve Garden Soil
  • What We Learned by Having Our Garden Soil Tested
  • How to Make Compost Tea
  • How to Test Seeds for Viability
  • How to Disinfect Seed Trays

Homemade Potting Soil Recipe (2024)

FAQs

How do I make my own potting soil? ›

Ingredients can be measured with a standard 10-quart bucket.
  1. 30 quarts brown peat.
  2. 20 quarts sand or perlite.
  3. 20 quarts compost.
  4. 10 quarts soil.
  5. 3 cups base fertilizer (equal parts blood meal, colloidal phosphate, greensand)
  6. ½ cup lime.
Apr 15, 2024

What is the best soil mixture for potted plants? ›

Although the ingredients tend to vary, good mixes always contain an organic component (peat moss, compost, bark), vermiculite or perlite (to help retain moisture), sand, nutrients and limestone.

Is it cheaper to make your own potting soil? ›

Before we go any further, note that if you only need a few small containers' worth of potting mix, you may actually be better off buying a pre-made mix! Making your own is usually only economical on a large scale.

What is the main ingredient in potting soil? ›

Potting soil, also called potting mix, is a blend of materials like sphagnum moss, bark, perlite, vermiculite, compost or coir that's intended for growing plants in containers. Guess what it doesn't have? Soil. That's because soil can carry fungus and other plant pathogens that can infect your plants.

How long does homemade potting soil last? ›

For unopened and unused potting soil, you can store it for about a year or two before it goes bad. Usually, potting soil lasts longer when stored in a dry and cool container.

Is there a difference between potting soil and potting mix? ›

Potting mix is commonly lighter and has better drainage and aeration than standard potting soil. It's also sterile, so you can be sure it won't introduce any fungi or weeds. However, because it's not soil, you'll want to replace it (i.e., repot your houseplants with fresh mix) every six to eight months.

How to make the best soil for plants? ›

The best soil for potted plants will contain a blend of coconut coir fiber, vermiculite, perlite, organic fertilizer, sand, compost, and peat moss and is rich in basic nutrients required by the plants. It should be well aerated and should be able to retain moisture and nutrition well.

Can I use bagged topsoil for potted plants? ›

Topsoil is excellent for landscaping and filling spaces, but potting soil is better if you need a growing medium for container plants. And if you want an Earth-positive soil that's beneficial for any potted plant, you'll love Rosy's Indoor Potting Mix.

What is better than potting soil? ›

Potting Mix vs Potting Soil: Which One Should You Use? Potting soil's composition makes it suitable for outdoor plants. On the other hand, a soilless potting mix is a better choice for potted plants or a container garden because it: Offers a good balance of moisture retention and water drainage for potted plants.

Is topsoil just as good as potting soil? ›

The ingredients in potting soil are more specific to your intended growing environment because its contents are more consistent than topsoil. Topsoil has a wider range of materials because its contents are taken from the top of a field, meaning it isn't as sterile as potting soil.

Is it OK to use garden soil as potting soil? ›

Can You Use Garden Soil as a Substitute for Potting Soil or Vice-versa? Yes, you could use either garden soil or potting soil to grow outdoor plants. However, potting soil is a better choice as a growing medium as it's specifically created to support plant growth.

What is the best homemade potting mix? ›

A standard recipe for a homemade soilless mix consists of half sphagnum peat moss and half perlite or vermiculite. To mix ½ bushel basket or four gallons of media: Start by pouring two gallons of peat moss into the bushel basket. Add two gallons of either perlite or vermiculite and mix thoroughly.

What ingredients should I avoid in potting soil? ›

Note: Avoid potting soils containing peat moss (decomposed sphagnum moss), vermiculite, perlite, and coconut coir as these ingredients have heavy carbon footprints.

What is the formula for potting mix? ›

For a potting mix:
  1. 1 part peat moss.
  2. 1 part perlite.
  3. 2 parts compost.

What is the difference between potting mix and potting soil? ›

Potting mix is commonly lighter and has better drainage and aeration than standard potting soil. It's also sterile, so you can be sure it won't introduce any fungi or weeds. However, because it's not soil, you'll want to replace it (i.e., repot your houseplants with fresh mix) every six to eight months.

Can you use regular soil for potting soil? ›

Can You Use Garden Soil as a Substitute for Potting Soil or Vice-versa? Yes, you could use either garden soil or potting soil to grow outdoor plants. However, potting soil is a better choice as a growing medium as it's specifically created to support plant growth.

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