I am running a bunch of Mallard Mix from Sonoma Compost vs. Roots Greenfields vs
FFOF in 800 gallon rectangular "smartbeds", custom made by
smart pots. There will also be a number of 65 gallon smartpots involved.
I'll be doing this in a Light Deprivation environment. Since the unamended soils will have plenty of N for the 2 weeks of veg they will undergo before I start to force flowering, I will not be amending with anything but dried kelp in the Sonoma Compost and Alfalfa meal in everything. Oh... and I add norcal perlite 1:6 to everything...
I do add amendments to my 200 gallon smartpots that will go the full season.
I have seen excellent results in "truck dirt"...after this season I will have definitive beliefs as to whether or not Bulk Dirt, at 1/3 (or better) the price of Bagged Dirt is really a bargain.