Thanks Duckie! That was excactly the kind of info I was looking for. Though I can't help but wonder...
When I didn't see any form of sodium (at least not that I recognize) on Rugby's list, I went digging for the MG site, and looked at their label for plant
& veggie soil. They list the N/P/K content, but nothing else really - of coure the percentages don't add up to 100, so I wonder what else is in there - meaning, is the sodium and other stuff not listed, or is what not listed just the compost variables that are in the soil. Hmm.
So, I figured I'd check out their organic soil mix - without getting into a science thesis, the mixture is similar, but the contents are derrived from manure alone, rather than additives, but seem to contain close to the same mix of NPK. So, I'm still confused about what's in their stuff, 'organic' or not...
They refered the reader to a website to see levels of metals in their mix - which only gives you an option for the Oregon and Washington depts of agriculture - which in turn lead me in yet another circle, finding no results in their search engine for 'miracle gro' - but finding reports in oregon that Scotts had violated some of their testing requirements, and had a cease and desist order to stop the distribution of their product in Oregon! Hmmm!
If you've read this far, thanks
If you find any other info about MG, please pass it along - it's peaked my interest now!