This is a bit technical but good information from my favourite magazine:

by J Benton Jones, Jr.

pH is defined as the negative log of the hydrogen ion (H+) concentration on a scale from 0 to 14, 7.0 being the neutral point, with less than 7.0 being defined as “acidic” and greater than 7.0 as “alkaline.”  The optimum pH ranges for plant root function growing in a mineral soil, an organic soil, a soilless organic rooting medium, or a hydroponic nutrient solution are not the same. In addition, there is no one explanation for the pH effect on plant roots growing in these four media. A pH range of 4.5 to 8.5 is the normal encompassing range associated with these rooting media with plants functioning best in “acidic” environments.

Read more……….

This entry was posted on Monday, February 15th, 2010 at 10:28 pm and is filed under Hydroponic Systems, Hydroponic Systems, Hydroponics. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.