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Foliar Feeding: Myth? Or does it actually do something?

I've always been told that the wax on leaves renders foliar feeding 100% useless unless you apply something to dissolve the wax beforehand, and then apply the foliar feeding.

True or not true? I really think that foliar feeding is a waste of time unless you take the wax off the leaves. Otherwise the water just beads riiiiiiiiight off. I think it's a gimmick.


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