5 Best Homemade Seed Starting Mix Recipes

Why splurge money when you can make your own seed mix easily? Check out these 5 Best Homemade Seed Starting Mix Recipes below.
Homemade Seed Starting Mix recipe

There are seed starting mix recipes with peat or with coconut coir. One suggests to sterilize the soil for 30 minutes at 120 ° C in the oven, another at 180 ° C and a third option is to put soil in 800 watts for 10 minutes in the microwave.

In any case, there are a three basic fundamental things to note for before moving further:

Seed starting mix must be sterilized. It must be low in nutrients and its texture must be light and permeable.

Ingredients for Homemade Seed Starting Mix Recipes

The main ingredients of our seed starting mix are mostly peat moss or coco peat and vermiculite or perlite.

1. Peat moss or Coco Peat

Peat Moss

Peat improves aeration and can save a lot of water. It is acidic and contains less or no nutrients and if you’re using peat, *add 1/4 tablespoon lime per gallon in the mix to balance the pH.

The biggest downside of using peat is it can only be obtained by destroying the remaining Mires. There are peat-free alternatives like coco peat you must opt for.

Coco peat

Best and better alternative of peat moss is coco peat. Coconut fibers are offered in lightweight blocks that swell to become large when water is added. The Benefit of using coco peat over peat moss is that its production doesn’t harm the environment. It also has macro-nutrients and potassium and it is neutral, unlike peat, which is acidic.


Leaf Mold

Leaf mold is a kind of a lazy man’s compost. It is an outcome of the natural rotting process of leaves. You can use leaf mold to sow seeds. Here’s an interesting on The Guardian for you to read.

Pine Bark humus

Bark humus produced from the composting of the bark. The bark originates mostly from conifers. These crusts must be composted for a long period of time. The result is perfect for growing plants: Water permeable and stable structure. The small roots can grow unhindered.

Composted Wood fiber

Wood fibers have similar favorable properties as coir. They are also low in nutrients. The material must, of course, do not come from treated wood waste.

Cat Litter

Cat litter is a good ingredient for plants that require very few nutrients. For example, cacti. With a nutrient-free mixture of perlite or pumice and cat litter, you give seedlings the best ground for rooting.

Important: Use non-clumping, mineral-based cat litter.

2. Perlite or Vermiculite


Perlite is a volcanic mineral. It doesn’t absorb water or other nutrients, thus improved drainage. It also has insulating properties that help the plant roots during fluctuation in temperature. *You can also use pumice instead of perlite.


Vermiculite is light, but unlike perlite, it retains water and nutrients and release that when needed. It also helps in drainage.



You can use sand if you don’t have perlite or vermiculite. Sand is always there as a part in soil. It is important for a stable soil structure and drainage. Sand does not contain any nutrients.

3. Compost

Compost is used in a few of the seed starting mix recipes given below. If you’re using compost make sure it is fine. You can also use manure instead of it.

Must Read: Potting Soil vs Seed Starting Mix

5 Homemade Seed Starting Mix Recipes

Make seed starting mix depending on the seeds you’re sowing and their nutrient requirements.

We divided these recipes into three types: Recipe 1, for high energy requirements seeds. Recipe 2 and 3, for medium and low energy requirement seeds.

  • High requirement seeds are those that require more energy to germinate. Many annual flowers and vegetables, such as potatoes, tomatoes, cabbage, sunflower and geraniums.
  • Average requirement seeds are the ones that need less energy for germination. This includes Allium, pumpkin, cucumber, snapdragons, dahlias and gloxinias.
  • Low requirement seeds are those that require less or no nutrients for germination. They are most of the herbs, lettuce, azaleas, begonias, petunias and pansies and most of the plants belong to Crassulaceae family and palm species

Two Basic Seed Starting Mix Recipe

These two basic seed starting mix recipes are easiest, most popular and perfect.

1. The easiest seed starting mix recipe is to add 1/2 part of perlite, vermiculite or sand and 1/2 part of peat moss or coco peat.

2. Mix 1/3 part coco peat or peat moss, 1/3 part compost and 1/3 part of vermiculite or perlite or sand. In such a mix sow seeds that require more energy to grow.

Recipe 1 (High Requirement)

Peat or Peat alternatives 40%
Compost 30%
Garden soil, sand and bark humus 30%

Recipe 2 (Average Requirement)

Peat moss, coco peat or wood fiber 55%
Compost 20%
Sand 15%
Bark humus 10%

Recipe 3 (Low Requirement)

Peat or Peat alternative 50%
Perlite or Perlite alternative 45%
Bark humus 5%


Mix the proportion well before sterilization and make it evenly moist (especially when you are using peat moss). This happens best when the soil is kept in a discarded oven (45 minutes at 150 ° C) or in a microwave oven (10 minutes at 800 watts). This will make your soil disease free.

Caveat: Dried peat moss is flammable.

Also Read: Using Coffee Grounds in the Garden

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seed starting mix recipies



  1. If the coconut is endangered and we are loosing the coconut to pandemic lethal yellowing diseases; How is using coconut any better for the ‘environment’ than peat?. This article claims “the biggest downside of using peat is it can only be obtained by destroying the remaining Mires”. OK but what about the destruction of the coconut from yellow diseases? Furthermore, the “production” of coco peat also harms the environment. If you are going to write an article claiming people should not use peat because the only way to get peat is to destroy the remaining mires, you must also state that in order to get coco peat we must destroy the remaining endangered coconut.

    • it’s not coco peat, its a part of the husk of the coconut that is used. It has absolutely nothing to do with destroying groves of coconut trees

      • Creating additional uses for products such as coconut, that are plantable and harvestable, increased investment in the agriculture of said product, and means that people are more likely to want to find solutions for problems associated with the product. Finding additional uses for an agricultural crop is only harmful if lands that would’ve been better left untucked are then modified for cultivation of said crop.

        This is why use of paper products isn’t really as bad as many people believe- those trees are a commodity, and they’re *going* to be replaced. The problem is even we grow too many fast growing, profitable trees and other native area trees lose habitat or resources.

  2. Frank,
    It seems you have not heard of coconut…it is available in plenty in equitorial regions and the outer skin of the nut is used as coco peat…it actually not a peat but some one started calling it peat because of usage….it is not endangered by any streatch….there are more endangered animals and birds than coconuts….

  3. Come to India my friends…There are endless coconut groves for miles and miles we go. We get Cocopeat at as cheap as $1 per Kg.

  4. Coco coir is combustible, too. Not just peat. Ask me (and my insurance company) how I know.

    Instead of sterilizing your mix in an oven, it is much safer and just as effective to hydrate your mix with boiling water and letting it sit until cooled-off.


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