I use Majestic Earth brand "Professional Growers Mix". Some of the 'cleanest' mix I have come across, no big unprocessed twigs, and the rocks are left out also :cool:
Just good 'clean': Peat, Perlite, Gypsum, and Dolomite Lime... add your choice of organics, and some extra Perlite or Rice Hulls (etc.) for some extra drainage and you are good to grow :p... plain ol 'potable' tap water is all you need (chlorine free). The organics I use, I only top dress the soil every 4 - 6 weeks... all water (and maybe some molasses/tea drinks if I feel like it) for those 4 - 6 weeks... really easy and inexpensive to grow that way.
Big bag (1 cu ft compressed) of 'Pro Mix' ~$4 - 7 with tax (if on sale $4.29 with tax)
Big bag of Rice Hulls ~$9 with tax
4lb Bag of Organics ~$10 with tax (Jobe's, Espoma, Dr Earth, Down To Earth, etc.)
'Optional' Bottle of Grandmas Black Strap Unsulfured Molasses ~$3 with tax.
$29 is all I really need to grow some good meds... I spoil my garden a little more with Buffaloam, Kelp, EM1 (home made), Azomite, Mycos, Gypsum and a few other goodies... I think I spend a whole $80 on my soil/nutes every 5 years :eek: