Making Potting Soil

Posted on Jun 5 2009 - 1:00am by Mike Lieberman

In a previous post, I explained the basic differences between coconut coir and peat moss based potting soils. Now I am going to show you how to make your own potting soil using a peat moss base.

Here’s what you need to make your own organic potting soil:

  • Sphagnum peat moss – holds water and air; provides little nutriton
  • Vermiculite – provides minerals (potassium, calcium and magnesium)
  • Garden lime – provides minerals (calcium) and balances acidity of peat moss
  • Compost – provides the lion share of the nutrition to the plants
  • Large bin to mix it all in. Watch the video and you’ll know why you’ll need to use a large bin.
  • To mix it:

  • Add the mixture at a close 1:1:1 ratio of the peat moss: vermiculite: garden lime. You definitely want peat moss to be the dominant ingredient. Mix well.
  • Now that you have the peat moss mixture, add an equal part of compost. Mix well.
  • Add some water to dampen the mixture. Don’t want to saturate it. Mix well.
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