Is There Enough Air in Your Potting Soil?

One property of your potting mix you should be concerned with: does you soil have enough air spaces to maintain healthy roots? In this video, I'll demonstrate a quick an easy way to measure the approximate air-filled porosity (AFP) of your potting mix. The higher the porosity, the more air space there is for your plant roots - but it also means you may have to water more frequently. With a lower AFP, you can go longer between watering, but your plants may be more susceptible to root rot disease. Generally, a good AFP for containers and nursery production is between 15 and 25%. Here's a link with more details on what the % ranges mean:
https://www.agric.wa.gov.au/nursery-cutflowers/potting-mixes

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