Related: How to Start a Garden in 10 Steps Potting mix isn't soil at all—and it contains no actual dirt or earth. It's a sterile mixture made up of organic matter like peat moss and organic materials ...
This article deals with potting ... after opening. Organic components can be manures, worm castings, composted barks, sphagnum moss, peat, or coir (coconut husks). These provide nutrients and moisture ...