Plant Problems Symptoms: Spots or markings

Problem: Leaves may become yellow in between the veins, with mottled brown spots on the affected leaves. These brown dead patches may spread and eventually kill the leaf. Leaves may also shred and fall apart. Overall growth of the marijuana plant may be stunted. With a manganese deficiency, the yellowing will begin at the base...
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by Nebula Haze Tobacco Mosaic Virus (TMV) is a virus that is commonly found in tobacco plants which causes splotchy or twisted leaves, strange mottling symptoms (a "mosaic"), slowed growth, and reduced yields. Mosaic virus has spread to several other species of plants, and although we don't know for certain, there is evidence from many growers that cannabis...
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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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by Nebula Haze Cannabis Leaf Problem / Symptoms: With a marijuana potassium deficiency, you'll generally see symptoms on older leaves, but not always. Sometimes you'll see the symptoms at the top of the plant. Leaves with a potassium deficiency get yellow, brown, or burnt tips around the edges and tips. The burnt edges may look a little...
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Problem: A boron deficiency in cannabis is relatively rare unless a plant is underwatered or in a really dry environment, and is usually accompanied by other types of nutrient or pH problems that appear as problems with the leaves. The first signs of a cannabis boron deficiency is abnormal or thick growth tips along with...
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by Nebula Haze Spider mites are part of the mite family and are related to spiders, ticks, and other mites. Although they're a common cannabis pest, they can be very difficult to get rid of. First Sign of Spider Mite Damage - Tiny Specks (Bite Marks) On Leaves Complete List of Ways to Kill Spider Mites Picture of spider...
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