If you’ve ever tried those store-bought seed starting mixes, some of them can be of great quality and texture, while others not so much. They’re also generic and may not have the nutrients, texture, or drainage you’re looking for.

In this article, I’m going to teach you how to make your own seed-starting soil at home. It’s going to have the perfect texture and drainage so that you can bring your seeds to life with it in no time.  

The first advantage of using homemade seed starting soil is that it’s obviously much cheaper. You can make it in any desired quantity and use it as much as you need. 

Because you can manipulate nutrients and the composition of your mix, it can be a lot more effective compared to generic seed-starting soil.

Lower unnecessary additives is also an attractive point for many gardeners.

  • Coconut Coir Or Peat Moss: These materials will help retain moisture in your seed starting mix while staying light and fluffy.
  • Perlite Or Vermiculite: These are ideal for keeping the soil from getting too tightly compacted. They also improve soil drainage.
  • Compost Or Worm Castings: Can help with early growth by providing natural nutrients.
  • Garden Soil Or Sand: These ingredients help to create a balanced texture and can bring your final mix together.
  • Optional: If you’re planting your seeds on a container use Arlite, expanded clay pebbles. They’re a great choice for drainage at the bottom of your containers. It helps prevent water from pooling, reducing the risk of root rot and fungal issues. If you’re planting on a seed tray, just skip this!

Before you start mixing everything up and getting ready to sow your first seed, measure out each ingredient you want to add. Too much of anything can have adverse effects so make sure you’re taking a balanced approach. 

The ratio I usually use is: 2 parts coconut coir, 1 part perlite, 1 part compost and ½ part garden soil. 

Put all your ingredients into a large bucket or container. Make sure it’s large enough so that none of the mixture falls out and messes up the quantities. 

Using your hand or simply a fork, mix your ingredients really well, making sure everything is evenly blended. You don’t want to have large chunks of anything as those can hinder drainage and the overall texture of the mix. 

Before you actually use your homemade seed starting mix, make sure to add some water and lightly moisten it. No need to go overboard with this and flood your soil though; we don’t want waterlogging problems. 

And, if you’re planting on a container, don’t forget to add the argile on the bottom!

For the best results, it’s very important that you use your seed starting mix carefully and intelligently.

Fill seed trays with the mixture but make sure the soil isn’t crumbling and dropping everywhere; filling it 3-4 of the way for each compartment is enough

Ideally, you want to keep the seed starting mix damp but not soggy. Water gently and carefully, making sure not to overwater your soil or else waterlogging problems can surface.

To prevent fungal issues, practice bottom watering so that your seeds remain safe and healthy in the soil. 

In a world where everyone wants the store-bought stuff and easy shortcuts, I’m glad gardeners like you are still looking to make homemade soil to start seeds how you want.

It’s cheaper, has fewer unnecessary chemicals, and can probably work more effectively thanks to personalized formulation. Best of luck with your mix! 

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