What happens when the leaves of an orchid turn black?

Your flowers are not placed in a shady location, orchids are positive plants and should be allowed to grow in the sun.

I think that this situation can be caused by too much watering, which is a situation with a high probability of occurring, because watering is not measured, and it is believed that the more watering, the better the orchid grows, which leads to waterlogging in the roots, and then makes the leaves black. It is also possible that too much fertilization is commonly known as "burning" seedlings, which is extremely unfavorable to the growth of orchids and can easily lead to the death of orchids. ‍‍

The reason for the blackening of orchids may be too much watering, or it may be a disease, and the reason can be found from these two aspects.

Too much light. The leaves turn from green to brown and then to black. Protect against direct sunlight. In summer, you can only see light in the morning and evening, and you can receive astigmatism around noon.

Orchids that have just been planted have black tips and black spots on their leaves, mostly due to excessive watering. Normally, when planting orchids, if the cultivation medium used is relatively moist, then it is possible to temporarily leave it unwatered after planting. It makes sense to wait for three or five days, or a week before watering.

Because the root system of orchids is most afraid of moisture and water damage. If the planting material is relatively dry when planting and potting, you can water it once after planting, but it must be placed in a ventilated and cool place to strengthen the ventilation of the orchid. Freshly planted orchids must be watered too often.

Xinlan is best avoided from wet. In this case, you can pour out the orchid plants, dry the roots and soil to replant. As long as the black tip is not very serious, and the new seedlings that grow do not have the black tip phenomenon, then there is not much of a problem.

Since ancient times, orchids have paid attention to dry cultivation, but the degree of dry cultivation is to pay attention to one"Run"Word. It's not that you have to go without watering your orchids for a long time. The frequency and amount of watering must be mastered.

When using relatively loose and breathable planting materials with large particle size, the orchid environment has good ventilation conditions. If it is in summer and autumn, you can water once or twice a week, and in winter and spring, you can extend the watering time appropriately.

We have orchids at home, there are many possibilities for this phenomenon, such as water is not well controlled, watering too much, too much light, too much fertilization, etc., will cause the orchid leaf tip to blacken, but now in winter, the sunlight is not so strong, if it is because of these factors caused by the leaf tip blackening can not be so quickly revealed. Once that's all that's left is what you should be wary of. Or there are many possibilities for this phenomenon, such as water is not well controlled, watering too much, too much light, too much fertilization, etc., will cause the tip of the orchid leaf to blacken, but now in winter, the sunlight is not so strong, if it is because of these factors caused by the tip of the leaf tip black, it can not be so quickly revealed.

Once that's all that's left is what you should be wary of.

The newly potted orchid has black leaf tips, which must be due to the bad roots and rotten roots in the transplanting process. If only some of the leaves are blackened, you can cut off the blackened leaves first, and then observe whether the blackening of the leaf tips spreads in two days. If the leaves continue to turn black, the roots need to be reprocessed and transplanted.

It is necessary to cut off the rotten roots and necrotic roots, then soak them in potassium permanganate solution for disinfection, drying, and re-cultivation.

The appearance of blackening of the leaf tips indicates that the orchid is not adapted to the potting soil. This may be the case: the new pot is not quenched.

For the new pots just bought, they should be cleaned with water, and the clay pots and clay pots should be soaked with water and then dried before they can be used to plant flowers. Orchids should be pruned, and empty roots and rotten roots should be cut off to prevent contamination of new roots. After potting and cultivating, it should be watered in time and watered thoroughly.

Newly potted orchids should not be placed outdoors in strong light, but should be placed in the astigmatism of indoor balconies. Caused by poor substrates. Too acidic and alkaline, or poor hydrophobic and breathable properties, resulting in the root is not adaptable, affecting the growth.

It can be leaf spot, which is caused by improper watering, excessive water accumulation, or unreasonable structure of planting material, poor drainage caused by orchid root rot, and sometimes the invasion of pathogens can also lead to root rot. The rotten roots cause the orchid leaves to turn yellow, shrivel, fall off, and easily induce black spot disease, sometimes even the reeds are rotten, and even the whole plant dies. Orchids with leaf spot disease should strengthen ventilation and light, reduce air humidity, and cut off diseased leaves.

During the onset period, spray with chlorothalonil wettable powder 800 times, spray once a week, and spray 3 times in a row.

Generally, we see that there are small dots on the leaves of orchids, and some dots are denser to form a piece of black-brown spots, which is mainly caused by too strong light, such as Molanhuilan, their requirements for light are not very strict, and the amount of light required is not very large, if we suddenly put it in a place with strong light, its leaves will appear black at the tips of the leaves, and there are black spots on the leaves, and too strong light for a long time will also cause its leaves to change from dark green to a yellowish green. If you raise an orchid, its leaves have black spots one by one, the main reason is caused by too much light, and if you weaken the light appropriately, its new leaves will not appear in this situation.

The leaves of the orchid begin to turn black and dry from the roots, which is due to the infection of stem rot, which first causes the false bulb and root system of the orchid to be damaged and blackened and rotted, and then gradually spreads upwards to the leaves, causing the leaves to also turn black and die and fall off.

At this time, the orchid plants were basically hopeless. Therefore, in daily management, we must grasp the supply of water, fertilizer, ventilation, etc., and do a good job of prevention, not to take it lightly. When symptoms appear, there is no way back.

1. Dry air: If the orchid is in a dry environment, the leaf moisture imbalance is easy to blacken, so it is necessary to spray water frequently to increase humidity. 2. Watering too much:

If you water it too much, it is easy to soak the roots and cause the leaves to turn black, so you need to stop the water as soon as possible and strengthen ventilation to evaporate the water. 3. Improper fertilization: If the fertilizer with high concentration is applied, it will cause fertilizer damage, and it needs to be rinsed off with water as soon as possible.

4. Infected with diseases: Once the infected leaves are easy to turn black, prune the diseased leaves as soon as possible and spray fungicides. 

The blackening of its leaves is mostly caused by four reasons. First, the light is too strong and the sun hurts, so pay attention to the strong light and be sure to block it in time. Move the plant to a ventilated semi-shaded place and sprinkle it with water to help it recover.

The second is to be infected with a disease, to find out the specific disease as soon as possible, but also to spray. The third is excessive watering, the water will be rooted, and the leaves are easy to blacken, so the plant should be depotted as soon as possible, pruned and re-maintained. Fourth, the roots are burned due to improper fertilization, and the roots should be depotted and repaired if necessary.

What is the cause of the black leaves of orchids and what to do if the leaves are black.

1. The light is too strong Orchids are semi-negative plants and are afraid of the sun. If it is maintained under strong light during the management period, especially in the scorching sun in summer, it is easy to sunburn the plant, and the leaves will turn black and yellow. In this case, the black leaves should be cut off as soon as possible, and then moved to a ventilated semi-shaded place, sprinkled with appropriate amount of water to help the plant cool down, and slowly recover.

2. Infection disease If the environment provided by the usual environment is not suitable for infection, it is easy to be infected with disease, once the infection is not treated in time, the leaves will have black spots, which will slowly expand, and the whole leaf will become black. It is necessary to find out the specific infection disease as soon as possible and spray it for treatment. In addition, maintenance methods need to be changed to provide a conducive environment for growth, so that the plants can recover.

3. Overwatering Orchids are not tolerant to waterlogging. If you water too often, the soil will be waterlogged, and the roots will rot after a long time, and the leaves will be easy to turn black and yellow. In this case, the plant should be depotted as soon as possible, the rotten roots and black leaves should be cut off, disinfected and replanted.

Orchid Fourth, improper fertilization It needs nutrients during the growth period, and it should be fertilized scientifically. If the concentration of fertilizer applied will burn the roots, the leaves will also be easy to blacken. To change the fertilization method, apply a low concentration of fertilizer.

In addition, if the situation is serious, it is necessary to remove pots, prune roots, change soil, and re-manage.