I grow this frequently for juicing. It's very important to RINSE the wheat grass at least once per day at ALL stages of the process to prevent mold from growing on the roots. Normally in doing hydroponic gardens, it's ideal to use a drip system but you can do it yourself using things you already have.
You heard me mention AZOMITE. You can get it here:
http://www.amazon.com/Lbs-Azomite-Additive-Fertilizer-Minerals/dp/B000E7MTT4/?_encoding=UTF8
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