Plant Problems Symptoms: Dark

Problem: A cannabis copper deficiency appears with leaf symptoms such as dark leaves that take on blue or even purple undertones. The tips and edges of leaves turn pale yellow or white in stark contrast to the rest of the leaves which have turned dark. In flowering it's important to correct a cannabis copper deficiency as...
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Problem: Dark green leaves, shiny leaves, clawing, weak stems, and overall slow growth. Marijuana leaves that are nitrogen toxic often get "The Claw" or talon-like leaves that are bent at the ends. They also do an odd curving (or cupping) that is often mistaken for overwatering, but is unique to nitrogen toxicity. You can see a "clawing" leaf pictured...
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