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The most common cause of marijuana leaf cupping aka leaf margin rolling, leaf margin burn, and leaf tip curl/burn is overzealous use of marijuana plant food. In relationship to factors such as marijuana plant vigour and rate of growth. Leaf burn is often the very first sign of too much marijuana fertilizer.
Rating Newest Oldest. Best Answer: The leaves of the cannabis plant can make tea. It will not have any effect, but tea can be made. Hell, you can make tea out of lawn clippings, its about the same thing. The Tricones of the cannabis plant are what contain the tetrahydrocannabinol (THC) that has an effect on humans. The only THC in concentration on a leave would be a Tricone that burst or dripped onto said leaf. So your answer is Yes.