[NAFEX] pH preference in pots

Alan Haigh alandhaigh at gmail.com
Fri Nov 7 11:51:36 EST 2008


When using typical potting mixtures, I was taught in hort-school that you
calibrate down one point so a plant that likes a pH of 6.5 in typical soil
would do best with a 5.5 pH in the articficial medium we call potting soil.
This is because the much higher level of organic matter in potting soil
changes the chemistry of nutrient availability.  A deeper explanation than
that is beyond my present grasp.
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