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Originally Posted by TRAY
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Superthrive is an expensive way to buy seaweed, alfalfa, and barley extract, all of which are plant hormones (not nutrients).
Protogrow is an expensive way to buy a mix of seaweed extract and fish emulsion. The website for Protogrow contains numerous errors and misleading statements. One chilling example is that Jerry Greenfield states that the numbers on fertilizer labels are percentages by volume, but in reality they are percentages by weight.