Think Zinc When Your Cannabis Yields Shrink
Zinc deficiency is addressed by all the usual ganja guru suspects whose cannabis cultivation advice I respect and have learned from in books, magazine articles, live lectures and internet postings. Their observed symptoms of interveinal chlorosis, edge and spot necrosis plus stunted new growth seem to me more the result of near or complete absence of zinc rather than a mere “deficiency”. After reviewing the literature, I’ve come to believe that zinc deficiency in cannabis is a very common yet silent suppressor of optimum yields. In food agriculture, crop yields can be attenuated by over 20% without any symptoms at all of zinc deficiency being visible; this can go on for years and you’d never know it. As with any chlorosis inducing condition, your first step in diagnosis and treatment is to check the pH of your cannabis growing media. If the pH is too high, even if sufficient zinc...
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