For saving space and soil, this method also has several
other benefits, including no soil-borne diseases, no
weeds to pull and no soil to till, run-of-the-mill side
benefits of soil-less gardening.

Nitric Acid

Many commercial growers use Nitric Acid (HNO3) for pH control. This would be a good option if you have hard water but it is not recommended for small scale growers.

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Nitric Acid is a very unpleasant and dangerous liquid, it is truly aggressive and should only be handled by experienced operators.


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