Pleasing their appearance potted plants. Orchids, whose flowers are distinguished by their magnificence and tenderness, is no exception. But it happens that the plant takes on a clearly painful look, and this upsets its owner. One of the most common questions about the ailments of these flowers: "Why do orchid leaves turn yellow?"
Causes of decay
Unfortunately, flowers also tend to hurt, as do people. And they need special care during this period, and most importantly, it is necessary to determine exactly why the leaves turn yellow in orchids. There can be several reasons for this. First, this is not always due to negative factors. The leaves may turn yellow at the end of their life cycle, that is, it is a completely natural process. Unfortunately, the negative reasons for the withering plants much more. One of them is the wrong arrangement: the orchid doesn’t like its habitat. For example, the sun burns too much, or, on the contrary, it is the shadow side, and the leaves lack light. Another reason is incorrect watering. You may be too intense in ensuring that the flower receives the right amount of moisture. Because of this, the substrate ceases to be "airy", the roots suffocate, and the leaves remain without replenishment. Watering need to pay great attention, because you can harm the plant. If water gets to the base of the leaf, it causes decay, and the nutrients do not pass on. To eliminate the cause of the problem, you need to unambiguously understand why the orchid leaves turn yellow.
Methods and means
To begin treatment, you need to accurately determine the cause, otherwise you can only harm the orchid. Methods of dealing with yellowed leaves are as varied as the causes of the problem. If the part of the leaves on which the sunlight falls the most, turns yellow, you should change the location of the pot, remove it from the scorching rays. In the case when the problem is related to irrigation, allow the substrate to dry completely. If the leaf has turned yellow from old age, gently tear it off and powder the wound with charcoal.
Other orchid diseases
The wilting of orchid leaves is far from the only problem arising from these delicate plants. There are other diseases. One of the most common problems is root rotting. This is mainly due to over-irrigation. Although the flowers of this family grow in tropical rainfall conditions, the environment is completely different than a cramped pot. If through the transparent walls of the container you see that the roots are turning brown, you need to urgently reanimate, namely: replant the orchid, cut off the damaged areas, completely change the substrate, and also the pot. In addition to the rotting of the roots, various insect pests can appear from over-watering or wetting in general. Among them are rot and spider mite. In this case, it will also help to change the soil and capacity, in addition, you will have to cut off the parts of the plant with the largest accumulation of insects.
Let's sum up
In this article, we learned why orchid leaves turn yellow, how to deal with it, as well as about the existence of other problems with such lovely flowers. Despite the subtleties mentioned, orchid lovers are becoming more and more. After all, how can you resist the tenderness of these beautiful flowers!
Finding yellowing leaves of the plant, do not panic. This is how the natural aging process takes place - each leaf has its own cycle. This happens in all plants. In mass hybrids, 1 lower leaf dries. Rarely dies 2 process. In instances of the nobile from the bulb, a complete fall may be observed.
We have yellowed orchid leaves, what to do? If this happens to the lower ones, do not panic right away. They dry out completely and separate themselves. Their trimming or tearing is not required in order not to injure the plant. It must be regularly inspected. Yellowing can occur quickly, in 1-4 days.
The age of orchids also influences - leaf cover in rare cases lasts for several years. Annual leaf discharge (during flowering or at rest) is considered normal. If competent care is performed, then such a problem rarely appears. If there are any omissions, the plant immediately reacts to them: it changes color or is delayed in development.
Lack of watering
This is one of the reasons why the orchid leaves have turned yellow. What to do? It all depends on the type of problem - drying or overwetting. This leads to a metabolic disorder and is the result of a change in foliage color.
The lack of watering, though rarely, still happens. As an example, phalaenopsis. The stem looks healthy and the roots are normal, and the foliage is yellow. This happens with regular watering. This is due to the method of moistening - when supplying water from a watering can, the bark is insufficiently moistened. Nutrient components will be missed, and young shoots, as it were, take them from the old ones.
To do this, use immersive watering so that there is no rapid waterlogging. Within 1-2 weeks after changing the mode of watering, the plant is restored.
A lot of moisture
The reason may be an excess of moisture, which often leads to diseases of the foliage. Because of this, there is rotting with bacteria. Florists recommend focusing not only on the top of the bark. It dries quickly, and in the depth of the substrate retains moisture for a long time. This must be taken into account before performing watering. In this case, transparent pots are convenient. If the container is opaque, then you need to take a wooden stick and place it near the rim, and after a few minutes it will be clear if watering is required.
Flower growers learn about the dryness of the soil "on weight", raising the capacity - the wet substrate is usually heavier than the dry. If yellowing is caused by over-irrigation, the following signs will appear:
- Change the color of all shoots.
- The appearance of black spots on the leaves.
- The foliage became soft and wet.
- Darkening of the roots and covering with dark spots.
Hard water is neutralized by peat in the substrate. Its content in this composition reaches up to 20%. If there is a process of decay, the orchid must be removed from the pot and repotted, paying attention to the roots. After that, the flower requires special care.
In addition to the irrigation schedule, moisture itself is important. Hard water with impurities leads to salinization of the soil. Having determined that the orchid leaves have turned yellow, it is necessary to change the ground. The foliage is washed with liquid fertilizer. During flowering, this procedure is preferably not performed.
Peresushka from the rays of the sun
We continue to understand why the orchid leaves have turned yellow and what to do. If the plant has stood for a long time on the hot side, it can get a sunburn. This is another reason why orchids turn yellow leaves. What to do in this case? It is necessary to change the location of the flower. If there is no extra space, the plants are shaded by furnishing others. You should not wait for the foliage to turn yellow and wilt. Many hybrids are not adapted to prolonged exposure to direct sunlight.
The area near the burn gradually dries out. Eliminate the entire leaflet is not required - a healthy plant has the strength to feed a healthy site. And if due to lack of lighting the orchid leaves turned yellow and fell off, what to do? In the cold period, additional light is applied (phytolamps, fluorescent devices). They must be turned on for several hours in order not to overheat the flower. Light-loving lines are Wanda, Lelia, Cattleya. It is advisable to keep these plants further from the north side. Otherwise, the foliage falls off the orchid, and it will be necessary to urgently eliminate it.
If the leaves and stem of the orchid have turned yellow, this may be due to fertilizer errors. Food colors is important. A lot of fertilizers are being sold, which are not suitable for some varieties. When buying you need to consult with the seller, naming the name of the variety.
If you suspect the presence of pests, the flower should not be fertilized - this can lead to the death of orchids. A separate nuance is the dosage.
If the orchid leaves turn yellow and fall off, then the reason may be an excess of fertilizer. Often, sellers perform pre-sales training using stimulants and nourishment. It improves the appearance of the flower. Such mistakes are made and beginners.
Overfed plant will last 1–2 years, and then foliage will turn yellow. Fertilizing plants is desirable after the "store" flowering, when the flower settled in a new place. Performing feeding, you should consider that:
- Fertilizer is applied during growth.
- Make-up combined with watering. Every second watering is the right time. Initially, soil moistening and shaking of the tank is required.
- When the leaves are formed, fertilizer is not particularly needed.
- In the cold feeding decreases, it should be done once a month. Some flowers are well experienced and the absolute lack of nutrition at this time.
- Do not fertilize weak and sick orchids. You should not carry out top dressing in the first month after transplantation.
Growth stimulants are best not to use for home flowers. If the orchid leaves turned yellow, what to do? When the cause of this phenomenon is in excess calcium, a diet adjustment is required. The flower can be transplanted into a balanced substrate. When you follow these rules, the plant will receive a calibrated dose.
Lack of fertilizer
This phenomenon is dangerous, as is glut. The plant usually suffers from a lack of potassium, which is evident by the yellowing of the tops of the sheets. Then the affected inner plate with dead veins will be noticeable. The reason for this process is that the flower lacks potassium, and when it is deficient, the young leaves pull the mineral from the older “neighbors”.
If the leaves turned yellow, how to save the orchid? To prevent them from falling off, the flower is transplanted into a new soil enriched in potassium. Single fertilizer is based on half the dose indicated on the package. It is important that the composition were potassium, phosphorus, nitrogen. Florists recommend to pay attention to the labeling of the means for recharge. Usually there are letters NPK, and next - the numbers. The code is what the fertilizer is meant for. Code 4-3-3 - for a set of green mass, and 4-6-6 - flowering stimulants.
If the leaves of the Phalaenopsis orchid turned yellow, what to do? When pests are the cause, they should be identified. They lead to fading and yellowing of foliage. First, the plant must be isolated from healthy.
The easiest way to identify spider mites. His presence is evidenced by a thin spider web inside the leaf and shoots. Eliminate the pest will get washing with warm water (40-45 degrees). Then the flower for 3 days covered with a package, it is important to monitor the condition of the soil.
On the back of the sheets settles aphid. These are green insects that sap from the plant juices, and also poison the cells. And also considered to be peddlers of fungi. If because of them the lower leaves have turned yellow in the orchid, what to do? They are washed with warm water, treated with soapy water. Then spraying of "Fitverm" is required.
And also it is necessary to prepare an infusion of citrus peel: 100 g is filled with water (1 liter). After infusing for 3 days with the solution, spray it every 5 hours for several days in a row.
If the orchid leaves have turned yellow from the shitovki, what should be done? First, the infected plant is isolated. Eliminate the pest will allow the solution of olive oil, diluted in water (1 tbsp. L. / 0.5 l.). The tool is applied to the affected areas. The procedure is performed 3 times with a week break. If the plant has thick leaves, rubbing with cotton wool moistened in ethyl alcohol is necessary. When washing with warm water, it is necessary to remove the young flaps. Then the plant is sprayed with "Fitoverm". This is repeated every 7-10 days.
When the orchid leaves turn yellow and fall off because of thrips, what should I do? They leave traces - small dots or silver plating. Get rid of them will turn out by washing with warm water and cutting off the affected areas to healthy places. Spraying helps with special preparations with a break of 10 days. The procedure is repeated 2 more times.
Usually in the flowers immediately noticeable changes. You can verify this by the photo. Orchid leaves turned yellow, what to do? If nematodes start, then Levamisole solution is used. The tablet must be dissolved in water (1 liter), and then the liquid is poured into the ground.
Licks do not leave sticky bloom on the flower. They are formed on plants that were kept outside. You can eliminate them by soaking the container in another container with water. Helps and transplanting with washing the roots. In the substrate, there may be other pests other than those listed. It is advisable to engage in prevention.
Yellowing and falling leaves also occurs due to the presence of infection. Fungal, viral, bacterial diseases can be obtained from the diseased plant. These flowers should be isolated from healthy. Fungal infects the plant due to oversight. A sign are dark yellow spots on the leaves and stems. With these ailments there are bumps. If there are not many of them, treatment with a fungicide is performed.
When running cases, cut off the patient area or the entire sheet. In the treatment should not incise themselves bumps. Cut points are processed. Often there is a gray rot, which should be treated with Immunocytophyte. Mealy dew is eliminated by "Antidote", anthracnose - "Mikosanom".
Perhaps the appearance of viruses. They occur during stress - when transporting a flower, sudden changes in temperature, change of humidity. Infection can occur during watering. Leaves acquire dark rings, but there are other signs. Antibiotic and fungicidal treatment is required.
Bacterial spotting appears on old leaves. They become softened, there is yellowness with a dark shade. Visible ulcers that secrete fluid. Treatment involves cutting the problem area, and the incision is treated with iodine. Using tap water fills the soil with chlorine. To save the plant requires filtered water.
For the plant to develop properly, it needs competent care. Illumination is important. The main condition - diffused light, and it should be a lot. Therefore, the flower should be placed on a bright window (but not in the south), while simultaneously providing protection from direct sunlight.
Very frequent and abundant watering can harm. It is important to observe moderation. Between these procedures, the substrate should dry well. Moisturizing foliage is best done with a spray. In the summer it is necessary to water more abundantly, which can be done through the pan.
Plants like high humidity, which should be at least 60%. Otherwise, you must purchase a humidifier. To maintain the normal growth of foliage need warm distilled water. And at moderate humidity, systematic spraying is required.
Thus, the article identifies common causes of yellowing of the leaves, as well as methods for eliminating the problem. Thanks to attentive care, the plant will develop properly, and the risk of pests or diseases will be reduced to a minimum.
Orchid leaves turn yellow due to improper watering.
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If the orchid looks healthy, has no rot on the roots and is moist and stained and drying out on the stem and shoots, and the leaves located below will turn yellow, most likely the plant lacks moisture. Many lovers of indoor flowers watered the orchid is not enough, not caring about soaking the entire volume of the substrate. The lack of water leads to the fact that the plant the lower leaves turn yellow.
Solve this problem easily, you need to provide the roots Phalaenopsis orchids sufficient moisture intake. It makes sense to try a new method of irrigation, if you previously applied the moistening of the soil with a liquid from a watering can. It is recommended to immerse the flower container under a stream of running water, allowing excess moisture to drain.
Excessive water intake of the root system harms no less than artificial drought. In this situation, the leaves are not dry, and become soft and acquire a brown-yellowish tint. Roots usually rot. Such a flower must be transplanted into a fresh substrate, after removing all the affected parts.
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Watch the video! How to water Phalaenopsis
Lack or excess of sun
If the plant receives little sunlight, its shoots are drawn out, and the color of the leaves changes from rich green to yellowish. The reaction of the plant itself can occur both gradually and abruptly. To prevent yellowing of leaves, it is necessary to choose a suitable place for cultivation, and in the winter period to provide an orchid with additional artificial lighting.
Interesting! A large number of orchid varieties need a long light day, but it is forbidden to the plant in direct sunlight. In case of insufficient light, the orchid leaves turn yellow and become covered with drying-out burns.
Листья орхидеи желтеют из-за жесткой воды и избытка удобрений
Salts contained in excess in water intended for irrigation have a negative effect on the whole plant. The leaves primarily signal changes and poor flower health. Sometimes it is difficult to determine the cause, which is the basis for changing the color of foliage. A clue may be the state of the substrate and the pot. In the presence of salt deposits, an explanation of the yellowness will be found.
Watering with hard water can cause chlorosis. A plant suffering from this disease turns yellow, only the veins on the leaves are green. Then fall offleavesand the orchid may die.
Recommendation! To save the plant is required to conduct its foliar feeding. after transplantFor this purpose, only special formulations are used.
Blooming orchid should not replant, In this case, it is recommended to do repeated washing of the substrate with clean, settled water. This method is also used to treat a flower that has suffered from an excessive amount of fertilizer used for top dressing.
There are a large number of factors affecting the change in color of orchid leaves. The reason may be a reaction to a change in the situation, after the purchase or transplant.
If a the leaves began to turn yellow, the capacity in which the orchid is grown is too small. In such a situation it is recommended to transplant a flower.
An orchid is a beautiful flower that does not require strong care, however, this flower may also cause pests. Knowing all the details of orchid care, the flower will always be with green leaves and beautiful flowers.
Watch the video! Why do orchid leaves turn yellow? main reasons
If your phalaenopsis, papiopedilum or cattley turned yellow and the bottom sheet began to dry, then there is no reason for concern: this is a natural process of the old leaves dying off so that the plant can form new ones. Sometimes two sheets may turn yellow and dry at the same time. In the orchid dendrobium nobile, the upper leaves of an already flowering bulba may turn yellow. In addition, this orchid sometimes sheds all the leaves, not only from the flowered, but also from the flowering bulba.
If you understand that the leaves turn yellow from old age, no action is needed: let the leaves dry out completely, and they will easily separate from the plant.
Violation of the mode of watering orchids
Most often, the leaves of the orchid phalaenopsis and other members of this exotic family turn yellow due to excessive watering: moisture blocks the access of air to the root system, which ceases to absorb food and begins to rot, and as a result the leaves turn yellow. Besides, in a wet environment, pathogenic fungal infections are more active, and this leads to the death of the ground and underground organs of the orchid.
Excessive watering occurs due to the fact that beginning flower growers erroneously orient themselves to the state of the upper layer of the substrate, which usually dries out a day after wetting, while in the depths of the pot the substrate remains wet for about a week. If you water the flower, as soon as the top layer of the substrate dries out, rotting of the roots and yellow leaves on the orchid you will not escape.
Often, due to lack of awareness, orchid hosts contain the plant literally in a vase of water. A hardy exotic beauty can tolerate both drought and flood for quite some time, but in the end it will get sick, and it will take a lot of time and effort to restore it. To determine that your orchid suffers from excess moisture, you will be helped by the following signs:
- not only the lower leaves, but also the upper leaves of the plant are covered with yellow
- leaves become sluggish and soft, black spots can appear on them,
- black spots are also formed on the trunk,
- orchid roots darken and barely visible through the transparent walls of the pot,
- the orchid loses its stability, scrolls in the substrate, and it seems that it can be easily pulled out of it.
If you find at least a few of the symptoms listed you need to remove the orchid from the pot, assess the condition of the root system, treat it, transplant the flower into a fresh substrate and change your attitude to watering.
Insufficient watering can also cause the yellow leaves of the orchid, which, due to lack of water, first lose the turgor, then shrink, turn yellow and dry. To make sure that the cause of the phenomenon is precisely the lack of moisture, carefully slide the wooden stick along the inner wall of the pot to the depth of the substrate and leave it there for a while. If the stick becomes dry after half an hour, this means that there is no moisture in the substrate, and if it remains wet, then the reason for the yellowness of the leaves is most likely something else.
You can see the condition of the roots in a transparent pot by sight: the green, slightly pearly phalaenopsis roots and the absence of condensation indicate that the root system is healthy and you need to look for another reason for the yellowing of the leaves.
Poor care and poor orchid conditions
The orchid turns yellow and dries if, when kept on a southern or western windowsill in strong heat, it was not protected from direct sun. When sunburn, the leaves do not turn yellow completely, but only in the place where the rays fell. It is necessary to move the orchid into the depth of the room or to curtain the glass so that the flower receives not direct, but diffused light. Remove burned sheet, disfigured spot, impractical as he continues to perform his functions. Wait until the plant itself wants to get rid of it, and when the leaf dries out completely, remove it.
If the plant becomes a small old pot, it may signal it yellowed leaves. And they turn yellow due to the fact that the roots of the orchid are in a constricted position due to the cramped position and are deformed. If this is the case, as soon as possible, transplant the plant into a pot that will be 3 cm larger than the old one.
The orchid grows naturally in a humid tropical forest, where wet evaporation from the ground rises from the ground, so at home the plant can suffer from a lack of moisture, especially in winter, in a room with air-drying heating devices. First, the tips of the leaves begin to darken, then the whole plate turns yellow, and eventually the leaf falls off. What can be done to increase the humidity of the air? It’s good if you have a household humidifier, but if you don’t have one, spray or wash orchid leaves as often as possible and place containers around the plant with water.
By yellowing the leaves, the orchid can react to any stressful situation for it. For example, to change the location, change of lighting or temperature, drafts or a sharp cooling. Treat the plant with care and do not disturb it with permutations if it feels good in its usual place.
Orchid nutritional imbalance
The problem with orchid leaves is also due to an imbalance in nutrition: there may be too many substances in the substrate, and too few substances in the substrate. From an excess of fertilizer in the substrate not only the leaves turn yellow and fall, but the stem also fades. In such cases, the plant stops feeding and does not allow it to bloom, and the substrate is washed with running water, allowed to flow and dried. Resume top dressing only after a month, but first the fertilizers are applied in half dosage.
If an orchid turns yellow and frowns, only the tips of the leaves, most likely, it suffers from an excess of calcium. Transplant a flower in a fresh substrate and do not feed it for at least a month.
The leaves turn yellow also from a lack of potassium in the substrate: the process begins with the upper leaves, on which yellow streaks first appear, and then the yellowness spreads over the entire plate, and the leaf falls off. Potassium fertilizers are used to restore orchids.
Orchid diseases and pests
Orchid leaves can be disfigured by fungal diseases of root or fusarium rot, as well as bacterial spotting. Root rot primarily affects the roots and trunk of an orchid, and then affects the yellowness and its leaves. It is necessary to remove the plant from the pot, cut out all the rotten places with a sharp sterile tool, grabbing a part of healthy tissue, treat the wounds with a fungicide solution, dry and transplant the orchid into a new soil. For preventive purposes, spray the plant from time to time with a fungicidal solution.
If orchid leaves not only turn yellow, but curl around the edges, this can be a symptom fusarium wiltafter which, after a short period of time, the whole plant will turn gray: the trunk of the orchid is rotting, and it dies. Most often, Fusarium affects miltonia and phalaenopsis. Orchid free from decay, as described above, and then for 10 days, three times a day, what is left of the plant is placed in a solution of the fungicide. This is the only way to try to save a flower with Fusarium.
Infected bacterial blotch the plants leaves turn yellow unevenly, then they lose their turgor, frowning, and wounds appear on them, oozing with liquid. You need to move the plant away from other household flowers, cut off the diseased areas and smear the wounds with medical iodine. If after this spots start to appear on the new leaves, you will have to resort to special preparations. It will be possible to return the orchid to the familiar place only when the leaves no longer appear on the leaves.
Orchid roots can strike pincers, due to which the leaves become soft, turn yellow and die. Ticks are destroyed by acaricides, after which the orchid is transplanted into a fresh substrate.
If you find a bloom resembling powdered sugar on the leaves, and when you turn the pot around the axis small white moths soar into the air, it means that the plant is populated whiteflies - sucking pests that feed on orchid juice. As a result of their activity, the leaves become sluggish and yellow. The plaque and insects are washed off with a strong soap solution, after which the ground part of the orchid is twice treated with an insecticidal agent twice a week.
The substrate for orchids is better to buy in a flower shop. Keep the plant on a well-lit window sill, on which direct rays do not fall. When airing the room there should be no drafts. For dressing you need to use a special fertilizer for orchids. Grow orchids better in transparent pots.
Why is it important to start treatment as early as possible?
At an early stage of the disease, it is desirable to treat any disease early. Do not run:
- Lesions are not as big
As soon as the orchid leaves begin to turn yellow, it is necessary to immediately begin treatment.
Let's take a closer look at what to do if the orchid leaves turn yellow.
Diagnosis of the disease
At home for these exotic plants proper conditions need to be created. So that they not only could grow. But please you with its beautiful flowering.
But create perfect conditions It does not always work:
- Somewhere overlooked,
- Often they simply overdid it
- Other reasons are also possible.
- For beginners it happens more often
- But even with experienced lovers of these colors, things are not going smoothly.
And as a result - the appearance of not quite healthy leaves. It is the orchid leaves that show that orchids are not doing well. The appearance of yellowed leaves on the orchid should always attract the attention of flower growers.
Not only the leaves turn yellow. But the stem and flower stalk. Important to determine the reason for their appearance:
- May worry not necessary:
- We do not panic in the fall with the appearance of yellow leaves and their fall. Even romance is seen in this. In an orchid this can be a natural growth process. Old leaves turn yellow. They are removed. What makes it possible to grow new
- Different species have their own characteristics with leaves. And the frequency of their renewal. They need to know and take into account
- There are also antagonist plants. Orchids do not like the neighborhood of some plants:
- Changes in the environment and conditions of detention may cause stressful orchids:
- Wrong location,
- Change of location
- Significant temperature drops. It manifests itself in the appearance of yellow leaves.
Due to improper watering the leaves may turn yellow.
Yellowed leaves often fall down.
Adjustment of the mode of watering
What should be watering? For the plant, it is detrimental like dry conditionand overmoistening.
Consider all factors:
- Season. Summer watered more often. In winter, watering is reduced in two times,
- Watering is different:
- When building green mass,
- When flowering,
- During the rest period (if there is one).
- Excessive water flooding is fraught with many consequences. Infection and rot may appear. Even die plants.
- Watering method:
- Most often they practice watering by immersion for a short time (5-20 minutes) containers with orchid,
- Watering from the watering can not always allow the roots to obtain the necessary moisture. Water leaves quickly and with high drainage,
- Spraying is not always suitable for everyone.
- Watering may be right. And the condition of the soil does not allow the passage of moisture and air access. Moisture stasis is formed. Experienced growers replace the substrate in 2-3 years. And others are advised
- Pay attention to the pot and its possibilities. Maybe you need to change to a more roomy. Consider the need for drainage holes in pots. After all, they are not necessary for all species,
- Remember to maintain the recommended humidity.
What is important to know about the mode of lighting plants
The lack of light leads not only to the yellowness of the leaves. But also to their droop. After all, the process of photosynthesis slows down significantly.
Due to the lack of lighting in the orchid may turn yellow leaves.
About lack lights say:
- Lighter than usual color of leaves,
- Depressed view of the plant,
- Shoots thin and elongated.
Orchids are all different, and each need your own lighting:
- Not all orchids grow in bright light. Among them:
- There are lovers and pritenennyh window sills and seats. The morning and evening sun they are enough:
- North windows with moderate lighting Pafiopedilumu and Dendrobiumu are quite suitable,
- Knowledge of the characteristics of each species allows adjust the correct lighting:
- The total time of exposure to light should be 12-14 hours per day,
- Orchids removed from the windows need additional lighting,
- For lighting, you can use different lighting options:
- Energy saving,
- The most popular phytolamps are Bicolor and Full Spectrum,
- They contain the necessary red and blue light spectrum for orchids.
- Experts do not recommend the use of heating lamps.
- Their effectiveness is low. Errors in the distance from the plants can lead to negative consequences.
Orchid leaves turn yellow: causes and treatment
The reasons for the yellowing of leaves in orchids can be many, and not all of them are due to pathological causes. If the plant is old enough, the change in color of the leaf plates can be quite natural causes (Figure 1).
However, there are cases when this process is associated with a specific pathology. In order not to lose the plant, you should carefully examine the flower and determine what factors could cause yellowing.
Aging of orchid leaves is a natural process.
Each sheet has its own life cycle, upon completion of which the color of the plate changes to yellow and it dies. As a rule, this occurs with the lower tier of leaves. If the rest of the plant is fine, there is no point in worrying: this is an absolutely natural process.
Figure 1. Natural yellowing of leaves.
It is important to consider that age yellowing depends on the variety. Thus, in the varieties of phalaenopsis, cattleya and paphyopedilum, the color of the lower tiers changes, and in the dendrobium, the color of the upper leaves may also change. In addition, there are cases that after the completion of flowering the whole plant completely resets the foliage.
Most orchids bloom only in the second or third year after planting, although by this time the plant already has several completely formed leaves. The natural aging process affects only a few leaves, while the culture itself retains a completely attractive appearance.
If the yellowing is due precisely to the age of the plant, no special actions need to be taken: the leaf will gradually completely dry and separate itself. But there are other factors that can cause yellowing. Most of them are associated with improper care of the crop, so in order to preserve the health of the plant, it is necessary to determine exactly what caused the pathology and revise the rules for caring for the flower.
Irrigation regime violation
One of the most common causes of yellowing of leaves is considered a violation of the mode of watering, and pathology can cause both excessive and insufficient moisture.
Since orchids are inhabitants of the tropics, they are very sensitive to moisture, so the irrigation regime should be clear and fully consistent with the characteristics of the plant. Consider what happens to flowers with excessive and insufficient moisture.
To give the flower enough moisture, a pot with a plant is recommended to be placed in a larger container filled with water. При этом горшок должен быть погруженным в воду примерно на треть.However, it is not recommended to leave the plant in water for a long time, as in this case the soil moisture will be increased.
When watering too much, the following happens: the soil is so saturated with moisture, and the roots do not get enough oxygen. As a result, the root system simply cannot nourish the aerial parts of the plant with useful substances and the leaves of the flower begin to turn yellow (Figure 2).
Figure 2. Signs of excess moisture
In addition, it should be noted that in a humid environment, fungi and bacteria often begin to develop, causing various diseases that can also change the appearance of the flower.
Not only excess, but also a lack of moisture can provoke yellowing of the leaves of the orchid (Figure 3).
Note: If the flower lacks moisture, its leaves become sluggish, gradually shrinking and drying out.
However, this process is much less common than changing the color of the plant due to excessive watering, and to remove it, it is enough to add enough moisture to the soil. But before the procedure you need to check whether the plant really lacks water. If your culture has an opaque pot, simply remove a few pieces of bark to assess the moisture content of the soil inside. You can also pierce the ground with a wooden stick: if it becomes wet, then your flower does not need additional watering, and the reason for the yellowing of the leaves is an excess of moisture.
Figure 3. Symptoms of Moisture Deficiency
In a transparent pot, it is easier to assess the degree of soil moistening: it is sufficient to estimate the color of the roots. They should be light green and pearl. Over time, you will learn to determine the need for watering simply by the weight of the pot: if it is light, then the soil inside has dried.
Problems with flower lighting
No less common cause of yellowing is the wrong lighting, more precisely - sunburn. If your flower is located on the south or west window, then in the summertime plants can get a sunburn.
With this pathology, not the whole leaf turns yellow, but only that part of it that has been in the sun for a long time. To fix the problem, simply move the flower to another location. There is no need to remove the damaged parts of the plant: they will either be restored, or they will dry out on their own and then it will be possible to carry out sanitary pruning of the flower.
Despite the fact that there are special feedings for orchids, they should be used carefully, and when choosing a fertilizer you should be guided by the cultivar, since there are different preparations for each type of flower.
It should also be borne in mind that all dressing must be used carefully and in strict accordance with the dosage, since an overabundance, like a lack of fertilizers, can change the appearance of the plant.
Lack of dressings
Leaves and may turn yellow if the plant lacks potassium or iron. With a shortage of these elements, the above-ground parts of the culture lose their natural color.
But before you buy and apply fertilizer, you should make sure that the problem really lies in the lack of useful substances. The fact is that yellowness can be caused not only by the lack of useful substances, but also by their excess.
Too often to feed the plant is not worth it. To do this, it is enough to apply special fertilizers only during the period of active growth and flowering of the crop, and the frequency of fertilizing should not exceed once every three weeks.
Determine that the culture of nutrients can be on the appearance of the leaves: if their tips began to turn yellow, then the soil contains too much potassium. It should also be borne in mind that in flower shops orchids are intentionally heavily fertilized to build up green mass. At home, when the dressing regimen stabilizes, the leaves may begin to turn yellow or even fall off. It is also possible that you yourself have accidentally exceeded the dosage of fertilizers. In this case, remove the culture from the pot and rinse the root system thoroughly under running water for 3-5 minutes. The procedure should be repeated every week, as a replacement for watering.
Inappropriate pot size
The reason for the yellowing of the leaves can be quite simple: your flower may just be cramped in a pot. This requirement is especially true for flowers that were only purchased in the store. Their pots often do not correspond to the size of the root system, and the plant requires a transplant.
Figure 4. Examples of incorrectly chosen pots.
To determine that your orchid needs to be transplanted into a larger pot, you can not only by the color of the aerial parts, but also by the roots, which will begin to strongly protrude from the container and dry in the open air (Figure 4).
The green aerial parts of the plant are very delicate, so they often become a tasty morsel for a variety of pests that can also cause yellow leaves (Figure 5).
Among the common pests of room orchids are:
- Spider mite feeds on the sap of the plant, and the stems of the leaves are covered with small dots (places of bites) and cobwebs. The diseased flower should be immediately isolated from the others so that the pests do not spread, and all the leaves of the affected specimen are thoroughly washed with a solution of soap.
- Aphid not only changes the color of the sheet plate, but also causes a sticky coating on its surface. To eliminate the aphid, wash the orchid with soapy water and spray Fitoverm.
- Shchitovka - an insect that is difficult to eliminate, as its body is covered with a dense shield. It is easy to detect the pest: when a shield is damaged, characteristic growths appear on the plant's surface. To combat the pest, you can use folk remedies, like liquid ammonia or a mixture of water and vegetable oil, but it is better to use special preparations for this purpose, for example, Actellic.
Orchid diseases are considered to be a frequent cause of yellowing of leaves, and at home the culture mainly affects fungi. In this case, the leaves of the plant are covered with yellow spots.
To cope with the problem, you must carefully remove the affected parts, and the culture itself is sprayed with any fungicide. But even after such treatment, certain measures should be taken so that the fungus does not return. First of all, you need to inspect the flower for the presence of pests and revise the watering schedule, since a frequent cause of fungal diseases is an excess of moisture.
From the video you will learn even more useful information about the reasons for the yellowing of leaves in orchids and how to combat this problem.
How to deal with sunburn?
Sunburn leaves quite a frequent occurrence. Not only for beginners. In nature, these beauties are not located in the sun. Suffer from an excess of strong sunlight just the leaves. Shade a flower.
Direct sunlight can burn orchid leaves.
On the negative effects of sunlight will testify:
- Dark rough spots
- Sluggish and falling leaves,
- Places of burns in the form of shapeless spots,
- Depending on the degree of damage, the stem turns yellow. A reddish tint appears at the base of the stem.
- Shade an orchid
- Remove the damaged sheet,
- Treat slices with crushed activated carbon (brilliant green).
What to do with improper feeding?
A direct question requires a direct answer. At first stop improper feeding. And do feed correctly! This is just one of those situations when it’s better to fail.
Orchids in nature do not need feedings. And in the apartment the situation is different. If any trace elements are not enough, the plant itself will tell. So the yellow leaves can talk about the lack of potassium and iron.
Signs of defeat:
- The roots become like burned,
- Yellow tips first leaves. And then maybe the whole sheet,
- Weak growth
For orchid need feeding:
- How to feed. Orchid industry has much to offer. And, especially for orchids. See the content of beneficial trace elements,
- In practice, many experienced orchid lovers are advised not to forget conventional and familiar means. They are at hand. And the price is much more democratic:
- Garlic infusions of water,
- Even castor oil.
- When to feed:
- The frequency of making dressings in half less watering. In the summer, 1-2 times in 8-10 days are sufficient. After the transplants (plantings), they start feeding weeks after two or three,
- During the rest period, feeding is performed 1-2 times a month,
- They are used at a time when orchid needs to gain strength:
- During the growing season,
- When forming buds,
- After flowering.
Orchid can not be fed during flowering, only after.
What should be the water quality?
The culprit is yellowed leaves and water. Rather, its quality:
- The use of hard water leads to salinization of the substrate and the root system. And the need to replace the soil,
- Use filtered water,
- Use thawed and rainwater. If you are far away from roads and factories,
- And just tap water for some time,
- Think of changing the ground when it is clearly unsuitable.
Regulation of air humidity
Under apartment conditions, beginner orchid lovers do not always pay attention to humidity. There is temperature, there is enough light ...
But after all dry air does not allow orchids to grow normally. Its humidity significantly decreases when the heating systems are turned on.
- In hot weather and humidity should be higher
- At lower temperatures, high humidity contributes to the development of infections
- The required moisture is maintained by regular spraying. You can install additional pallets with wet clay. Or with water.
The problem of rotting roots: signs and what to do?
Busting with water when watering can lead to decay of the roots. The cause may be a developed and compacted substrate. Roots can not work at full strength. Draw moisture from the leaves. So they dry up.
Transparent containers allow you to verify the condition of the roots. Pay attention to their color. Act without delay. If the fears were confirmed:
- Take the orchid out of the pot,
- Freeing the roots of old soil
- Remove all damaged roots,
- Process slices with green paint (crushed coal),
- Plant the plant in a new substrate.
All diseases and do not count. Their only experts recorded about 90.
Due to various diseases, orchid leaves may also turn yellow.
Viral diseases very dangerous. But very rarely found. Can appear when shopping. Even timely treatment with antibiotics rarely helps. They are not only isolated. They are destroyed. Especially if you have a lot of orchids.
Bacterial diseases not so dangerous. On infection indicate dark brown spots with a yellow rim.
- Isolate the plant from other orchids,
- Use scissors to cut out the spots that have appeared.
- Cut the cut areas with activated carbon. And hydrogen peroxide even a place where there was an orchid,
- In the insulator, keep until the signs of the disease disappear.
Fungal diseases appear with improper care. Mandatory removal of affected areas of the plant with the processing of sections. Use fungicides to treat:
- Copper chlorine (HOM),
- Copper sulfate.
Your achievements in the cultivation of orchids can seriously harm and living things. Not just disease.
Scientists and experts have calculated that they know about 32 species of pests of orchids. They do not only harm these colors. And others as well. Most likely it can be:
- Spider mite Slightly noticeable white dots on the bottom of the leaves. And gossamer.
- Thrips. Very small insects. Excrement (dark points) and silver leaf color.
- Aphid. It is more known and visible:
- Regular inspections of your plants will help to detect them in a timely manner. And take action
- Wiping leaves with soapy water will help get rid of aphids,
- To eliminate ticks and thrips will have to apply special preparations:
- It is possible that the plant will need to be transplanted. To change the soil on the quality.
Methods of prevention
To prevent the appearance of unwanted yellow leaves and diseases will allow proper care of orchids. And the necessary conditions of detention. With obligatory taking into account the characteristics of each species:
- Support recommended temperature:
- In the summer - 23-28 degrees,
- In the winter of 15-19 degrees,
- Watch out for day and night temperatures. It should not exceed 4-5 degrees.
For orchids, you must ensure the correct temperature.
Look at the video why the orchid leaves turn yellow:
Find out on the video what mistakes should not be made during the care:
Interesting facts about the treatment of orchids for various diseases on the video:
Video review about various pests of orchids:
What are the types of orchids?
Nature has several thousand species of orchids, but, and in pots only some of their varieties can be grown. The most common of them are the following types:
- Phalaenopsis Orchid, it is considered popular in floriculture, as it does not require capricious care. The flowers of this plant resemble the wings of butterflies, which is a special elegance.
- A species of draculaIt represents a gloomy structure, but it looks very attractive.
- Papiopedilum orchid. The color of this plant is similar to the shoe, and its value is represented by a long flowering, which lasts 2 months or more.
- Aganizian the species loves a lot of light and moisture. Drought is nothing to it, otherwise it will deteriorate. It has large inflorescences, about 5 colors of dimensional forms.
- Vanda Orchid. Known for its tall. Very demanding to care. With improper watering and lack of light may begin to fade and turn yellow.
Each of the varieties presented requires careful maintenance, especially proper watering and fertilizer. Therefore, if the leaves began to turn yellow in the flower, it is important to find out the reason why this is happening in order to prevent the disease of the flower miracle.
What are the reasons why the leaves turn yellow?
If you don’t give the flower proper attention and care for it incorrectly, then sooner or later it will die. In order to prevent the sad finale, it is necessary to get acquainted with the reasons for the yellowness of the sheets, which can be expressed:
- in the natural yellowing of leaves,
- with insufficient light equipment,
- in the burn of the plant,
- with insufficient or excessive nutrition,
If the leaves are still beginning to turn yellow, do not immediately get scared, but you must do everything to avoid it. After all, the flower can manifest a natural drop foliage. In such a course of affairs, it is considered normal when one leaf turns yellow and the others remain green. This suggests that no need to worry. After all, the plant, thus, is updated, dropping one by one leaf by leaf. And in place of the yellowed leaf grows a brand new green.
If the sheet shows yellowness at the tip, and not on the base itself, then this indicates insufficient lighting. Solving such a problem is quite easy, just make the movement of a flower in a well-lit place. Otherwise, you will have to light the flower with a fluorescent lamp. Ignore the problem does not work, because the plant may simply die.
When yellowing spots should assume that there was a burn of the leaves. This often happens when a strong sunlight hits a plant under the influence of water droplets on an orchid when watering. To amaze an orchid and spoil the appearance of a plant can also be a fungal infection. It is important not to miss this moment and start the flower treatment in time.
If, along with the yellowing of the leaves, their lethargy is also traced, then this indicates poor lighting. The orchid is a thermophilic beauty, so it needs a certain amount of light, only so that the sun's rays are scattered when it hits the flower.
When buying an orchid in a flower pavilion, it is important to check with the seller about the features of its cultivation and care for it. After all, there are some types of plants that love the shadow, not the light. Then the living conditions for them must be made appropriate.
If, however, the plant does not have enough nutrients, which is manifested in the lethargy and paleness of the foliage, then you can simply feed them with a special fertilizer. According to the rules, it is necessary to fertilize an orchid only during the flowering season no more than 1 time in 14 days. Fertilizers have already been combined and sold in flower shops. It is not recommended to make fertilizer on your own, as this may damage the plant.
Also sometimes it is necessary to change the soil for the orchid. This procedure is performed no more than 1 time in two years. After that, the flower should not be fertilized for some time, since the substrate already contains useful components.
How to determine that the plant will turn yellow?
One of the forerunners of yellowing leaves can be considered the presence of roughness on them, the change in their composition, which is noticeable already by visual inspection.
Если такое обнаружено, то лучше незамедлительно поработать над устранением причины, чтобы сохранить цветок здоровым. В этом помогут такие мероприятия:
- Обеспечение растению обильного и полноценного полива.
- Watering is done, using a watering can. This is necessary to disperse the liquid around the edges so as not to flood the center of the root system. If this happens, the plant should be dried so that it does not start to rot.
- Transplanting a flower in extensive dishes so that the plant was not crowded.
- Implementation of everyday spraying from the spray gun, in particular, during the heating season. This is done to avoid dry air.
What infectious diseases do orchids have?
One of the reasons for the yellowness of the leaves of an orchid can be infections that hit the plant. Sometimes even exposing a flower for sale, he is already infected with some kind of disease.
Therefore, before making a purchase, you must do a thorough inspection of the plant and pay attention to the slightest deviation in appearance.
Infectious lesions can manifest as:
One of the signs of viral damage is considered to be bright rings and ovals on the leaves, yellow spots and stripes. Orchid home can be infected with a virus for a very significant time, and does not show itself. Only upon the occurrence of favorable conditions, the disease will manifest itself, and will destroy the flower.
Bacterial diseases will not do much harm to an orchid if treatment is started promptly. One of the manifestations of such a lesion are dark brown or black spots with yellowness on the plant. Before you begin to treat the plant, you need to rearrange it from healthy flowers. Then carry out the cutting of spots with the processing of those places with a solution of activated carbon. In the late stage of the disease, treatment of the flower with antibiotics is indicated. Recovery can be judged by the absence of new spotted formations.
Such a dangerous attack, like bacterial rot, should not be ignored. It appears dark yellow or brown wet spots on the leaves of the plant. If this is noticed, you should immediately begin treatment. This will help hydrogen peroxide, which are processed as the leaves, and the place where the flower contains. One of the important principles of treatment of diseased orchids is the isolation of the diseased plant from healthy ones until the flower recovers.
Very often, orchids are affected by fungal infections, which occur when the care of a plant is disturbed. They may have the appearance of dark yellow spots on a leaf base. In the treatment, emphasis is placed on the destruction of the affected leaves and the treatment of the plant with a fungicide solution.
It is worth noting that the reasons for the yellowness of leaves in orchids are vast, but if you follow certain rules in the care, then you will not have to watch for such defects on the leaves. In addition, acquiring an orchid, you must carefully inspect the plant, its leaves and roots. In the event of a disease, the appearance of the flower will indicate this.SharePinTweetSendSendSend