cthomato, everytime I started a 'scientific' experiment to really measure difference with organic vs synthetic fert. some major catastrophe interferes. I seldom use synthetics except in a few Earthboxes so I just can't tell you if one is superior over another. .
This year I had 6 earthboxes --3 with organic fert 3 with regular and a little hurricane came along-destroyed 2 foot tall plants and blew off plastic mulch covers and rained on the fert. strips. I straightened back the plastic on some of these boxes and took the shot. After that did not really go on with experiment.
