Misinformation of marijuana water consumption should not demonize crop
Amber Norori’s oped on April 19 (“Legalization of marijuana could promote drought alleviation”) contains many fallacies, leading the author to false conclusions.
She writes, “The average cannabis plant needs 6 gallons of water a day and has an average 150-day grow cycle, so for a medium sized grow with about 500 plants, that would be a total of 450,000 gallons for one harvest of one plot. To put this water use into perspective, the amount of water needed to raise cannabis is double the amount of water needed to grow grapes.”
Cal NORML examined the 6 gallons/day figure, which was not measured or calculated by Fish & Wildlife or any other agency, but merely extrapolated to from an early, incomplete estimate. Cal NORML did a study and put the figure at 2.3 gallons/day, but not for the entire 150-day cycle.
The real question, however, is yield. While cannabis, acre for...
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