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Originally Posted by saltydad
Hey Richard- what about SuperThrive and Messenger? Both are highly touted, not as ferts but as vitamins/hormones, plant defense stimulators. What do you think?
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Superthrive has the synthetic hormone NAA which breaks apical dominance in roots. At high concentrations, it will limit growth and may kill.
Plants have to recognize a disease in order to activate their defenses. Messenger says that it is a protein recognized by plants as a sign of disease. I guess you'd have to test it out and see what happens. I can't see how it would help a plant to have it expending energy on disease resistance when it isn't needed at all times.