why are my basil leaves turning black?
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Dark, water-soaked spots on your basil plant's leaves may indicate a bacterial leaf spot infection, caused by the bacteria Pseudomonas cichorii. Symptoms may eventually lead to wet stem rot. ... Bacterial leaf spot can be controlled by removing infected leaves when your basil plant is dry.
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Some common traits of bad fresh basil are discoloration, a moist texture and a rotten smell. Basil will first become limp and then the green leaves turn black. Dried basil that is going bad will change color from dark green to brown as it looses its natural oils with age.
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Curling leaves can be a sign of virus. When black spots appear on the surface of the leaves, it means that parasitic fungi attacked your Kalanchoe. This can occur at extremely low temperatures and excessive watering when the soil does not have time to dry out.
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One of the most common causes for yellowing leaves is too much moisture or overwatering. Generally, on over-watered plants, the bottom portions of geraniums have yellow leaves. They may also develop pale-looking water spots. ... Water or air temperature that is too cool can also result in geranium yellow leaves.
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Improper watering – Root rot, a result of too much water, is one of the most common reasons for yellow leaves on basil plants. Water basil only when the top 1 to 2 inches (3 cm.) of soil is dry, and remember that slightly dry soil is healthier than soggy soil.
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Look at the fronds to see if they are completely black which indicates that the tree is suffering from a manganese deficiency. If only some of of the leaves are black, the tree is still alive and fertilizer will revive it. If all of the leaves are black then the queen palm is dead.
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An indication that your aloe vera plant is not receiving enough water is brown leaf tips. However, a more common indication of improper watering is black spots on the leaves due to overwatering.
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One of the most common causes for yellowing leaves is too much moisture or overwatering. Generally, on over-watered plants, the bottom portions of geraniums have yellow leaves. They may also develop pale-looking water spots. If this is the case, you should immediately stop watering and allow the plants to dry out.
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The most likely reason for the yellowing leaves may be that the heat of summer is too much for the plant and its roots cannot keep up with the water loss and it is therefore getting rid of some of its leaves. Parsley usually comes into its own when the days and nights get cooler towards fall.
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The burning (browning of leaves) could be from watering in the heat of the day. ... Sometimes plants that are stressed with too much water or too little shed their excess leaves too. Keep an eye on your watering and make sure the soil doesn't dry out in-between watering or that the soil isn't water logged at all.
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Dehydration is the cause of leaf tips turning brown and drying out before the entire leaf dies. Sometimes increasing watering to two or three times a week cures the problem, but other times the dehydration is a sign that the roots have ceased functioning and absorbing water.
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Powdery or downy mildew both begin as spots on the leaves, which can lead to browning and dying of the foliage. Anthracnose, leaf spot and blight can all cause the foliage of cucumber plants to turn brown and die. To avoid disease that causes browning and dying leaves, use the proper hygienic gardening practices.
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Start picking the leaves of basil as soon as the plants are 6 to 8 inches tall. Once temperatures hit 80°F (27°C), basil will really start leafing out. Harvest in the early morning, when leaves are at their juiciest. Make sure to pick the leaves regularly to encourage growth throughout the summer.
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There are 3 things that can cause peace lilies to turn black. The first is a water issue – too much or too little. ... Exposure to extreme cold will turn the peace lily leaves black. Exposure to extreme heat or sunlight usually causes a yellow/brownish discoloration before it becomes black.
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Leaf tips turn brown when that lost water can't be replaced for some reason. ... Anything that inhibits roots from absorbing enough water — or supplying it to the plant fast enough — can lead to unsightly brown tips. This includes providing the plant with too much water, too little water or too much fertilizer.
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Lack of Water Nasturtiums prefer loamy or sandy soils and you must keep the soil moist. A lack of water will cause the leaves to turn yellow. When nasturtiums are stressed, they're also more likely to be attacked by aphids. ... The leaves turn yellow as their roots die.
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Well, if the leaves of your live plants start to turn brown or black and die, it might be an indication of excess phosphate levels in the tank. Or it could be an excess of nitrates that may have caused this problem. The best thing to do is to perform a large water change to improve water quality in your tank.