I am using 10 gallon bags full of promix hp. Probably like 7 - 8 gallons of actual promix, as i don't fill them right to the top. I have some from last year that I just left in the woods, and I will be adding new bags this year. I didn't use lime last year. How much lime per bag should I be using for this years bags and last years too if the number is different?
I dont know the ph of promix but i know its a bit low for cannabis. Add 1/2 cup of qualtiy ag lime and mix it in thourougly.