Plant Problems Symptoms: Yellow leaves

Beet Curly Top Virus (BCTV) is a cannabis plant disease that may cause curling, twisting leaves, yellowing, and stunting. Often spread by leafhoppers.
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Planthoppers can attack and infest cannabis, leaving a unique cotton-like growth while they suck the life out of your plants! Planthoppers also spread plant diseases, so you want them away from your plants as soon as possible. Example of leaf damage from planthoppers. (Thanks to George4green for several of the awesome planthopper pics) Melanoliarus planthopper
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Hemp russet mites are tiny bugs that attack cannabis plants. In fact, they are so small you can only see them with a magnifier unless there are thousands of them infesting your marijuana plant. They live the crevices of leaves, stems, or buds, and the initial symptoms are not that serious. Many cannabis growers may
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Manganese deficiency can cause cannabis leaves to become yellow in between the veins, with mottled brown spots on the affected leaves. Learn how to treat it!
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Tobacco mosaic virus causes strange mottling symptoms in the leaves, slow growth and reduced yields. Learn how to identify and treat TMV for good!
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Cannabis leaf edges and tips turning yellow? Copper deficiency can cause dark, shiny leaves with purple or blue undertones. Learn how to spot and treat it!
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From wilting to dropping to yellow leaves to nutrient deficiencies, under watering cannabis can cause a lot of unexpected problems and symptoms. Learn & fix!
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Discover how to finally beat root rot (brown or slimy roots) for good! The secret to curing and prevention is a supplement with a particular type of bacteria!
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Does your plant have "the claw?" The talon-like leaves that are bent at the ends are a sign that your plant may have nitrogen toxicity. Learn how to fix it.
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Leaves with a potassium deficiency have yellow, brown, or burnt edges and tips. It may look like nutrient burn, but the leaf margins also turn yellow.
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