I would like to amend my used soil and I’m hoping someone can help with the measurements. I have a lot of Dr Earth 4-4-4 & 3-9-4 and was hoping I could use that to amend the soil. I know I’d have to add worm castings and possibly other things as well, I just don’t know what, or at what amount. Any and all help is greatly appreciated, thanks
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I normally top dress at 1 Tblspn per gallon. I’m not sure if that’s the measurement I should use if I want to reuse my soil or if it should be a larger amount. What would be nice is if I could mix in the nutrients to the used soil, let it cook for a few months, and be good. I’m in the Midwest and will not be growing from late Spring to Summer, so I have 4 months where the soil can cook.