Orchids are typical representatives of the tropics. And although they adapt well to the conditions of indoor cultivation, it is unreasonable to treat them as other indoor plants. This is understood almost all novice growers. But, alas, only understanding is not enough. It is also necessary to make efforts, sometimes considerable, so that the orchid at home feels most comfortable. Otherwise, it is not something that will not bloom, but it may not survive at all.
Most often inexperienced orchid lovers face the problem that orchid leaves turn yellow. This phenomenon delivers a lot of unpleasant moments to its owner, especially if it takes on a mass character. In itself, the death of old leaves is a normal phenomenon, they are simply replaced by new foliage, and that’s all. But if yellowing of more than one leaf begins, it is urgent to take action.
Today, the most popular orchid is phalaenopsis. On his example, we will consider why the orchids turn yellow leaves and what to do.
There are several main reasons:
- Wrong watering
- Wrong spot for orchid
- Damaged growth point
Consider these reasons in more detail.
Most often problems arise from excessive waterlogging of the substrate, rather than from its drying. Phalaenopsis epiphytic plants and the bark of trees, which is the basis of the substrate for orchids, is more for supporting and fixing the plant than for their nutrition and livelihoods. Therefore, if the substrate is constantly wet, it will be difficult for the roots of the plant to supply the air they need. Root rotting begins. The first symptom of this is yellowing of the leaves. At the same time, they lose turgor, become lethargic and subsequently die off. If the process is started, rotting of the stem begins and phalaenopsis inevitably dies.
Determine that phalaenopsis is watered over the top can be easily, thanks to a transparent pot. A constant excess of moisture is indicated by:
- constantly wet, dark bark in a pot,
- dark green roots, some with signs of rotting,
- on the walls of the pot is constantly present condensate, water droplets,
- pot plant constantly heavy.
What to do
If the process of yellowing the leaves has just begun and a sign of overwetting is found, you should immediately stop watering and then less often.
If the damage to phalaenopsis is significant, if most of the leaves are yellowed, black specks appear on them, a large number of roots with signs of decay have appeared, then phalaenopsis should be immediately removed from the substrate and all damaged roots and leaves should be removed. After that, depending on the degree of damage, proceed to rescue. If the damage is minimal, then you can simply transplant the orchid into a fresh substrate and significantly limit watering. During the period of resuscitation, one can limit oneself only by spraying the upper layer of the substrate.
In case of significant damage, more radical measures should be taken. Patient orchid is not planted in a pot. In this case, you should choose a reliable, stable support (for example, a piece of a tree trunk), fix the plant on it with the help of coconut fiber, place it under a glass or film hood and place this structure in place with diffused light. In the process of resuscitation, only the support is moistened, and the leaves are periodically wiped with a wet swab.
Lack of moisture
But not only excess moisture can cause the orchids to turn yellow leaves. The reason for this may be the opposite - insufficient watering. One of the main signs of lack of moisture phalaenopsis - white roots of the plant. Most often this happens from the wrong irrigation technique. When watering from above is common for other plants, the substrate containing the orchid is not sufficiently wetted and uneven. As a result, yellowing and dying off of the lower tier of leaves occurs.
What to do
In this case, it is necessary to water Phalaenopsis only by immersion in water. If you already do that, then water irrigation.
Poor water for irrigation
Many novice orchid lovers do not give this aspect due importance. But hard water with high salt content can cause significant damage to the plant and cause the orchid to turn yellow leaves. A sign that a lot of salt in the water is salt deposits, whitish plaque on the walls of the pot and the substrate.
What to do
If during this period your plant does not bloom, then we can only confine transplantation. During the flowering of phalaenopsis salt, you can try to wash out of the substrate, repeatedly immersing the pot in warm soft water or a mixture of soft and distilled water.
Lack of light
Along with yellowing and falling leaves, the lack of light for orchids is also characterized by excessive stretching of the shoots. The lack of light can even cause a sharp fall of the leaves.
What to do
If possible, move the orchid to a more lighted place. Provide artificial highlighting.
In particular, for phalaenopsis, yellowing of the leaves is more characteristic with too bright, sunny light. This orchid is more shade tolerant than its relatives. When direct sunlight hits the orchid leaves, burns of varying degrees of severity are inevitable - from the appearance of a yellow border on the leaf, to large burn spots on the entire leaf plate.
What to do
If a burn has received one or two sheets, then it is enough to remove them and move the phalaenopsis to a place where it will be isolated from the burning sun rays. In the case of serious damage to most of the leaves, but with a healthy stem and roots, you should move the plant to a shaded place and stop watering for a while, increasing the humidity of the air. If the stem and roots are damaged together with the leaves, then it is unlikely that the plant will be reanimated.
Orchid growth point is damaged
Such damage is characteristic of the monopodial group of orchids with a single trunk. The growth point of phalaenopsis is located at the top of the stem and can be damaged both mechanically and as a result of incipient rotting. As a result, phalaenopsis leaves begin to turn yellow and rot from the upper tier. Gradually, decay spreads to the entire stem and roots. Most often, this is a consequence of getting to the point of growth of moisture during irrigation and careless spraying.
What to do
It is necessary to immediately remove the damaged parts of the plant, reduce watering, reduce the humidity of the air.
Also, the reason that the orchid leaves turn yellow can be various fungal diseases that are caused by overwetting. This may be the impact of pests, among which the most likely - the root and spider mites. At detection of diseases and pests should immediately treat the plant with the appropriate drug.
An abrupt change in conditions can also cause yellowing of the leaves. This is especially true for newly purchased orchids.
When a basal baby appears in an adult phalaenopsis, the plant directs all its efforts to its development. As a result of this, the old plant may weaken considerably, and its leaves will begin to turn yellow.
Natural reason. The bottom sheet of phalaenopsis is the oldest. If he began to gradually turn yellow and die off, then do not worry - his time has come.
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 experienced lovers of these colors are not doing well.
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 destructive as 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.
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:
With the defeat of pests, the plant also begins to turn yellow. Most often orchids afflict the spider mite. They struggle with it by washing the flower with warm (40–45 degrees) water. After that, the plant for three days covered with a simple package. Before treatment, the affected plant is placed in quarantine.
Timely inspection of the plant can prevent the development of pests that suck the juice from the plant, after which it weakens, fades and turns yellow.SharePinTweetSendSendSend