What’s Wrong with My Marijuana Plant? A Cannabis Grower’s Visual Guide to Easy Diagnosis and Organic Remedies book by David Deardorff and Kathryn Wadsworth, pictured Wednesday, Feb. 14, 2018, in San Francisco, Calif.

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What’s Wrong with My Marijuana Plant? A Cannabis Grower’s Visual Guide to Easy Diagnosis and Organic Remedies book by David Deardorff and Kathryn Wadsworth, pictured Wednesday, Feb. 14, 2018, in San Francisco, Calif.