If your soil is good and the microbes are active, it is very possible Joe. I haven't used a single granule of Earth Juice pH down this grow. I was skeptical to give it up, but the proof is in the pudding.
I think a huge help is that my letting my water dechlorinate for 24-48 hours and then brewing the Aerated Compost Teas, brings my tap water down from about 9.0-9.2 range....to about 7.6. From there nothing gets touched. Just my teas and the dirt they were planted in.
When I got serious about growing, it was my intention to be able to grow cannabis in my own soil using water only, no nutes. I am not quite there yet.....I still have used the Cal-Mag last grow due to over vegging because of mites and once on this current grow to fix my deficiency that appeared by running them too long in the 1 gallon pot. A couple more tweaks to my soil and streamlining my up-potting timeline and size and I think I will be just about there.
I hate giving my money to nute companies. I would much rather put in a little sweat into mixing up a top notch soil and be able to water every 4-6 days with my teas or water only.
My nutes are things like Kelp (plan on starting to harvest my own along the coast when it warms up a bit), worm poop, bird poop, Crab/shrimp/oyster shells, compost, and things of that sorts. I would love to get to the point where I don't really need to buy much of any of these things and I can produce my own or find them naturally.
