just a note...

i dont know how this effects your argument but:
in reviewing the NPK ratio of M.G. soil you stated that it was .21-.07-.14; that is equivalent to a 3-1-2 NPK ratio, that also translates to a 45-15-30 ratio which is much different from the (i think) suggested 15-30-15 ratio for growing cannabis. Could it be an excess of N (nitrogen)? Perhaps too much P (phosphorus)... or it could also be too much K (potassium). Either way I wouldnt discount the different ratio of nutes in MG soil, it is not insignifficant.

That being said, I am actually 4 weeks into a grow using miracle grow soil, and I must say I have not seen any of the adverse effects people warn about yet. I have had better grows, but so far I dont think there are any downsides to this grow that can definitly be attributed to the MG soil.

Just want to enter in one more alleged "problem" of MG soil...
It concerns MG soil's 3month release of ferts. Because it releases ferts in an uncontrolled manner, I have heard some say that after 3 months your shouldnt be giving your plant ferts because it is too close to harvesting. Even if you harvest 3 weeks after fertilizing some of it will remain in the plant (including the buds) and you dont want to smoke bud that has remnants of fertilizer in it. For one it is dangerous, and secondly it gives a bad smell and taste to the buds which makes smoking it unpleasant. Again I dont know if this is definitly true, but it is something I have repeatedly heard.

If my grow with MG soil goes succesfully I will be sure to post comments on it.

JPG