Customer Q's: What is potting mix?

This series is based on customer questions. You can submit your own question here!

Question:

What is potting mix?

Answer:

Potting mix is a soil-less medium created specifically for container gardening. It is not dirt and has very little in common with real dirt. It is lightweight, does not compact over time, retains water well, and has excellent drainage.

It’s made up of some blend peat moss, perlite, vermiculite, coconut coir, and bark. It also includes nutrients and a wetting agent. The nutrients will get used up by the plant over time. The wetting agent helps the peat moss (which is naturally hydrophobic—it repels water) to get wet and retain water.

Over time, the wetting agent will wash away, and you’ll notice that older potting mix has a much harder time getting wet. That’s one of the reasons you need to repot once a year, so you can refresh the potting mix and make sure it’s retaining water properly. 

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