Why are mint leaves black? What causes mint leaves to turn black?

You've pinched it with your hands, right? Or left out for too long.

1. Water management

The blackening of the leaves of the mint may be a problem with the watering method, generally when watering the mint, you need to follow the principle of dry watering, do not water the potting soil if it is not dry, and wait for the soil to dry out at one time.

When watering, it is best to use rice water, which can provide a certain amount of camp material for mint, and it can also be watered with ordinary water, but it is necessary to be careful not to water directly with tap water, and you need to dry the tap water in the sun for a period of time before using it.

2. Ventilation and light

Peppermint prefers light, if the light is insufficient, it is easy to cause the leaves to turn yellow and black, so it is best to put it in a sunny place when breeding, if there is no sunny corner in indoor farming, you need to put the potted plant in a sunny place every two or three days to dry for a day or two, and so repeatedly, but it should be noted that in summer to avoid sun exposure, you need to carry out appropriate shading treatment.

3. Processing

The blackening of mint leaves is also very likely to be caused by **, generally mint will suffer from rust and spot blight, if it is a leaf blackening caused by disease, it should be carried out in time**.

1. Rust: Peppermint rust is a disease infected by fungi, which is generally easy to develop in the rainy season of spring and summer, and is also easy to cause this disease when it is too dry.

At the onset of the disease, there will be some yellow powder on the back of the leaves, and black spores will be produced in the later stage, resulting in black leaves, and when the disease is severe, the diseased leaves will dry up and fall off or even the whole plant will die. **Rust can be sprayed with disodium or Bordeaux solution.

2. Spot blight: mint spot blight is also a leaf disease caused by a fungus, which generally occurs in summer and autumn, and some dark green spots will appear on the leaves after the onset, and the spots will slowly expand and turn gray-brown in the later stage, resulting in black and wilted leaves, and in severe cases, it will cause large pieces of leaves to fall off.

To prevent and control spot blight, the diseased leaves should be removed in time, and all the infected leaves should be cut off and incinerated to prevent the spread of the disease.

Summary. Hello dear, <>

1. Insufficient light: Peppermint is a long-day crop, and insufficient light during growth will make the leaves wilt and blacken. 2. Watering too much:

Too much humidity in the soil and air makes the plants prone to dark leaves. 3. Excessive fertilization: If you apply thick fertilizer to mint for a long time, the root system will rot.

4. Disease cause: black spots will grow on mint leaves after being infected with rust and spot blight.

What is the reason why mint leaves are black.

Hello dear, <>

1. Insufficient light: Peppermint is a long-day crop, and insufficient light during growth will make the leaves wilt and blacken. 2. Watering too much:

The humidity in the soil and air is too high, and the plants are prone to black leaves. 3. Excessive fertilization: If you apply thick fertilizer to mint for a long time, the root system will rot.

4. Disease cause: black spots will grow on mint leaves after being infected with rust and spotted handshirt disease.

Is it okay to put this position, and is the state of this leaf healthy.

Pro, it is recommended to shine some light.

It is advisable to water less.

1.Lacking in light, peppermint is a long-day crop. In general, it is necessary to ensure that there is enough light, and if the environment is dark, the leaves of the plant will turn black.

This requires that it be placed in a sunny position so that it receives light throughout the day, and if the light is particularly strong, it can be properly shaded with a 30% shading net.

2.Overwatering.

Peppermint loves moisture, and adequate water is very beneficial for its growth. But if there is too much water and the environment is too wet, it may also affect the respiration of the roots, which in turn will cause the leaves to turn black. This requires enhanced air circulation and proper loosening of the soil to allow the moisture to evaporate as soon as possible.

When watering, you should also pay attention to controlling the amount of water, not too much, especially not to produce stagnant water.

3.Excessive fertilization.

Peppermint does not require much fertilizer, as long as sufficient basal fertilizer is applied at the time of planting, top dressing is rarely required in the later stage of growth. If it is applied too much, it is easy to cause fertilizer damage, burn the roots, and turn the leaves black. In case of such a problem, it is necessary to remove the pot in time, remove the plant from the pot, wash off the old soil at the root, check whether there is a problem with the root, cut off the place where it has rotted due to burns, spray a little carbendazim for disinfection, and prepare for replanting after air drying.

1. Water management

The blackening of mint leaves may be due to a problem with the watering method. Generally, when watering mint, you need to follow the principle of dry watering. Don't water the soil in the pot until it's dry, and then water it thoroughly when it's dry.

When watering, it is best to use rice washing water, which can provide some nutrients to the mint. It can also be watered with regular water, but be careful not to use tap water directly. You need to dry the tap water in the sun for a while before using it.

2. Ventilation and light

Peppermint loves light. If the light is insufficient, it is easy to cause the leaves to turn yellow and black. Therefore, it is best to keep it in a sunny place when breeding.

If there is no sunny corner in the indoor cultivation, the potted plants should be placed in a sunny place for a day or two every two or three days. And so on and so forth. However, it should be noted that proper shading is required in summer to avoid sun exposure.

3. Deal with nuclear dust.

The darkening of the mint leaves is also most likely caused by the disease. Generally, mint will have rust and white leaf blight. If the leaves turn black and it is caused by disease, it should be treated promptly.

1.Rust: Mint rust is a disease that is infected by a fungus.

Generally, it is easy to get sick during the rainy season in spring and summer, and it is easy to cause this disease if it is too dry. At the onset of the disease, some yellow powder will appear on the back of the leaves, and black spores will be produced in the later stage, causing the leaves to turn black. In severe cases, the diseased leaves will dry up or even die entirely.

Rust can be achieved by spraying bait sodium or Bordeaux liquid on infected plants**. 2.Spot blight:

Peppermint's spot blight is also a leaf disease caused by fungi that usually occurs in summer and autumn. After the onset of the disease, some dark green spots appear on the leaves. In the later stage, the spots will slowly expand and turn grayish-brown, causing the leaves to turn black, wilt, and in severe cases, a large number of leaves will fall off.

To prevent white leaf blight, the diseased leaves should be cleaned up in time, and all the infected leaves should be cut and burned to prevent the spread of the disease. At the same time, Bordeaux liquid or zebsen solution can be sprayed**.

1. Reasons why mint leaves turn black:

1. Normally, the mint leaves turn black because they are kept indoors for a long time, and they are not properly supplemented with light, and the leaves do not photosynthesize and make the leaves dry and black.

2. The blackening of mint leaves may also be caused by excessive watering and soil moisture, and too much water in the soil will affect the respiration of its roots, so that the leaves will turn black.

3. Peppermint has a low demand for fertilizer, so mint can be planted with sufficient base fertilizer, and it is rarely necessary to top dressing.

Second, peppermint blackening remedy:

1. After the mint leaves are blackened, it is necessary to strengthen field management, and to do dry watering and watering, that is, to water thoroughly at one time before drying, and to loosen the soil to maintain good ventilation and light.

2. Peppermint fertilization should be moderate and can not be fertilized too much, it is recommended to use well-rotted organic fertilizer in Duoxian Mountain, and choose disease-resistant varieties when selecting seeds, so as to reduce the blackening of leaves.

3. If the mint leaves are blackened, the leaves and dead branches should be cut off, and the maintenance should not be exposed to the sun, but should be moved to a bright place.

After the mint leaves are blackened, you can spray the mint with 300 times the liquid of dilude sodium or Bordeaux liquid spray, and then place it in a ventilated place, remove the blackened and dry leaves in time, and put it in a sunny place, so that it can receive light all day.