@Gary Pilarchik Gary Pilarchik: How to Make Inexpensive Sterile Starting & Potting Mix: Peat, Vermiculite & Perlite-No Fungus Gnats January 14, 2018
@California Gardening California Gardening: Coconut Coir vs Potting Mix Test : Soil Porosity Explained February 7, 2015
@California Gardening California Gardening: Coconut Coir Potting Mix Recipe – Coir, Compost, Perlite or Vermiculite December 13, 2014
@Gary Pilarchik Gary Pilarchik: For New Gardeners: What is Perlite, Peat Moss, Vermiculite and Seed Starting Mix – MFG 2014 December 13, 2013
