What is the reason for the yellowing of the leaves of the potted thyme

The yellowing of thyme leaves is the leaf blight disease of nine mile, which can be sprayed with 70% Tobuzin 1500 times solution or 50% antibacterial special 1000 times solution in early spring. Insect pests include aphids and red spiders.

Thyme is a small tree plant in the Rutaceae family. Born in low hills or high altitudes in open forests or dense forests. It is common in limestone areas, but also in granite areas, and sometimes in small areas.

Roots and leaves are used as herbal medicines. The taste is slightly pungent, bitter and spicy. Warm, with small poison, through the meridians, qi, blood circulation, blood circulation, blood stasis, pain relief, convulsion, swelling, detoxification.

Treat colds, headaches, stomach pain, toothaches, rheumatism, bone pain, bruises, swelling and pain.

1. Lack of light: it may be placed in a place without sunlight for a long time, or the light time is too short; In the process of feeding, you need plenty of sunlight, especially indoors, and you should choose a place with plenty of sunlight.

If you can't guarantee that you will be in the sun all day, you should spend at least 5 to 6 hours a day in the sun. However, the summer sun should be properly shaded, otherwise it will get sunburned. The other three seasons can be completely exposed to sunlight growth.

2. Insufficient water: there is no timely replenishment, or every time the water is not watered thoroughly, only the surface of the soil is wetted, and the weather temperature in the south is higher, so it has a higher demand for water. In spring and autumn, you can hydrate once a day, or every other day;

In summer, water is replenished twice a day, once in the morning and once in the evening, while in winter, depending on the condition of the soil, it can be replenished once every few days. Every time you give water, you must water thoroughly, and you must not water half and leave half, so that the potting soil will clump for a long time, which is very unfavorable to its growth.

The reasons for the yellowing of the leaves of the plant (Nine-mile) are: insufficient light (at least five or six hours of direct light can be seen every day), lack of water (need to replenish water in time).

Prefer warm, the most suitable temperature for growth is 20 32, not cold-tolerant, when the minimum temperature drops to about 5 in winter, move into the low temperature (5 10) indoor wintering, too early is not conducive to exercising its cold resistance. If the room temperature is too low, it is easy to lose the leaves, affecting the growth of the next year, and if it is lower than 0, it may freeze to death, and the room temperature is too high, the plant can not sleep well, and even germinate indoors.

It is a positive tree species, and it should be placed in a place with sufficient sunlight and good air circulation (at least five or six hours of direct light can be seen every day) to have lush leaves and fragrant flowers. When flowering, you can move to the windowsill, the room is full of fragrance, the flowers still need to be placed in a sunny place after the flowers, the growth in the semi-shade is not as strong as the sunny place, the fragrance of the flowers is also light, too shady then the branches are thin and soft, the leaf color is light, the flowers are few or no flowers. In winter, the room should also be placed in a sunny place.

Watering too much or too little, fertilizing too much or too little.

Excessive watering and long-term wetness of the potting soil cause a lack of oxygen in the soil, resulting in the rot of some fibrous roots, thus weakening the ability to absorb water and fertilizer, causing the young leaves to turn pale yellow, and the flowers and leaves to gradually turn dark yellow. Watering too little, or long-term watering of half of the water or leakage, so that the evaporation of water in the leaves is greater than the absorption, resulting in a shortage of water, and will also cause the leaves to turn yellow. Excessive fertilization, especially when too much nitrogen fertilizer and lack of phosphorus and potassium fertilizer, it is easy to cause the leaves to turn yellow, which is manifested as the new leaves are hypertrophied, the leaf surface is mostly uneven, the old leaves gradually turn yellow and fall off, and the leaf tips are dry and dry when serious, and even the whole leaf is burnt yellow.

Insufficient fertilization, especially if the soil has not been applied for a long time or has not been replaced, the nitrogen nutrient in the soil is insufficient, resulting in thin and yellow branches and leaves.

Lack of light, lack of fertilizer.

1. Water yellow: Do not accumulate water in the flower pot, it is easy to rot the roots and leaves to wither yellow. Depot the flowers, put them in a ventilated and cool shade, and dry the soil ball before putting them back into the pot.

2. Dry yellow: Bamboo likes to be moist, if you ignore watering, or only water the surface potting soil, the root system does not absorb enough water, and the stems and leaves slowly turn yellow. Pay attention to watering when watering enough, water thoroughly.

3. Lack of light yellow: bamboo likes warmth, and if it is placed in a shady environment for a long time, the plant will grow weak and turn yellow. In winter, it is best to put it in a sufficient place, if it is placed in a place with insufficient light, coupled with poor ventilation and cold, it is easy to cause yellowing of branches and leaves.

Supplemental light exposure can prevent the disease.

4. Fertilizer yellow: the concentration is too large or the fertilizer that has not yet rotted is easy to burn seedlings, even if it is dry and does not top dressing for a long time, it will also lose fertilizer and turn yellow. Fertilization should be stopped immediately, and part of the fertilizer should be washed with plenty of washing in severe cases.

5. Reasonable thinning: Hsinchu germinates quickly and has a large number, but the size is uneven, so it should be cut in time. The dense bamboo should be moved from time to time to maintain the appropriate density of the bamboo forest and ensure ventilation and light transmission.

At the same time, the deep turning and breaking of the whip are carried out, and the old whip that is more than four years old and the bamboo stalk after cutting down every year are dug out. After the intermittent migration and the excavation of bamboo roots, the pits should be filled with soil and miscellaneous fertilizer in time to keep the forest land level.

Potted flowers due to the pot soil less, space is limited, the root system can not be free to stretch down and to the surroundings, so the development is restricted, if the usual poor management, improper maintenance, will be more likely than the open field cultivation of flowers to occur leaf yellowing, light posture loss color, heavy the whole plant death. The remedial measures that should be taken according to the cause and symptoms of yellowing are: (1) Yellowing:

Excessive watering and long-term wetness of the potting soil cause a lack of oxygen in the soil, resulting in the rot of some fibrous roots, thus weakening the ability to absorb water and fertilizer, causing the young leaves to turn pale yellow and the flowers and leaves to turn dark yellow one after another. Watering should be controlled immediately, fertilization should be stopped, and the soil should be loosened frequently to make the potting soil well ventilated. If the disease is severe, the whole land needs to be removed from the pot and placed in a dry mound to make the water seep out quickly, and then replanted in the pot after the drooping branches and leaves have recovered.

2) Dry yellow: too little watering, or long-term watering of half of the water or leakage, so that the evaporation of water in the leaves is greater than the absorption, resulting in a shortage of water, and will also cause the leaves to turn yellow. "Dry yellow" is from the lower leaves gradually upward yellowing, scorched and shedding, in severe cases, the petiole droops and wilts.

Immediately after finding it, move the pot to a cool place, spray some water on the leaves, and water a small amount of water. Later, as the stems and leaves gradually return to straightness, gradually increase the amount of watering. If too much water is poured at this time, it may cause the cytoplasm wall to separate, the protoplasm to be damaged, and the flower to die.

3) Fat yellow: too much fertilization, especially when too much nitrogen fertilizer and lack of phosphorus and potassium fertilizer, it is easy to cause the leaves to turn yellow, which is manifested as new leaf hypertrophy, most of the leaf surface is uneven, the old leaves gradually turn yellow and fall off, and the leaf tips are dry and dry when serious, and even the whole leaf is scorched. In this case, fertilizer should be applied immediately, increase the amount of watering, let the fertilizer flow out of the drainage hole, or immediately pour the pot, remove part of the old soil, wash the soil with water, replace it with part of the new culture soil, and then replant the plant into the pot.

4) Hungry yellow: insufficient fertilization, especially for a long time without nitrogen fertilizer or not changing the potting soil, the lack of nitrogen nutrition in the soil, resulting in thin branches and leaves, thin and yellow leaves, need to be poured in time, the plant is taken out, replaced with a larger pot, loaded with a new loose and fertile culture soil, and replanted. After watering thoroughly, put the seedlings in a semi-shaded place to slow down, and apply thin liquid fertilizer or compound fertilizer after they resume growth.

Finally, it should be pointed out that the yellowing of potted leaves has a complex mechanism, sometimes caused by one cause, sometimes by several reasons. Therefore, when you find that the leaves are yellow, you should carefully observe and prescribe the right medicine to receive good results. At the same time, it should also be noted that not all yellow leaf phenomena are pathological diseases, for example, when the autumn wind sweeps away the leaves, deciduous flowers and trees are yellow and decided; Annual grasses and flowers wither and die; The aboveground branches and leaves of perennial roots are wilted; When the flowers are transplanted, a small amount of yellow leaves fall off due to temporary nutritional imbalance; Individual flowers, such as the peak of the branches and leaves for a long time do not prune, resulting in insufficient light in the inner branches, but also easy to cause the leaves to turn yellow and fall off, should pay attention to timely pruning, so that ventilation and light, at the same time pay attention to the appropriate increase in phosphorus, potassium fertilizer, to prevent the branches from growing.

Teach you three tricks to keep the leaves of green plants from yellowing!

There are several main types of causes of yellowing of the leaves of potted flowers:

1) Yellow leaves caused by excessive watering are manifested in the dark yellow and dull young leaves, but there is no obvious change in the old leaves, the branches and stems are small and yellow-green, and the new shoots are shrunk and not long.

2) Due to the long-term lack of watering, or less watering, the leaves are yellow, and the old leaves fall off from the bottom up, but the new leaves generally grow normally.

3) Potted flowers that like yellow and dampness, such as spider plant, evergreen, hosta, etc., if exposed to strong direct light, the leaves will appear scorched at the top or edge.

4) Alkali yellowSome acidic soil flowers and trees, such as gardenia, camellia, rhododendron, jasmine, etc., such as potting soil or water quality is alkaline, the leaves turn from green to yellow, and even fall off.

5) Fat yellow due to more fertilization or excessive concentration, the top of the new leaves appear dry brown, although the general leaf surface is thick and shiny, but most of them are uneven and unstretched, and the old leaves are dry and yellow and fall off.

6) Damp heat yellowSome potted flowers that are not resistant to high temperature and high humidity cause yellow leaves due to poor ventilation and improper shading in midsummer. For example, the hanging bell begonia has this phenomenon in summer.

7) Lack of fertilizer yellow potted flowers only watering for a long time without fertilization, or do not change the pot for many years, the roots are rolling, the top dressing is easy to leak, and the plant can not get fertilizer, resulting in yellowing of the leaves.

Potted flowers are harmed by diseases and insects or encounter sudden cold and heat, which can also cause yellow leaves to fall off. If only a few leaves are yellowed and fall off on the lower branches of the plant, this is a normal phenomenon of leaf maturity and aging.

In view of many years of breeding experience, the causes of leaf yellowing are none other than the following:

1. Insufficient sunlight or too much sunlight.

2. Lack of fertilizer.

3. The indoor temperature is too low to be frozen.

4. Watering too often.

Poor potting treatment is nothing more than 1. Improper fertilization 2. The temperature is too high 3 The alkali is large 4. The air is dry 5. The flowers are large and the pots are small 6. The branches and leaves are too dense and not pruned.

7. Lack of light, 8. Cold, and pests and diseases.

A few suggestions for the peace tree, if it is dry, water it quickly, spray the foliar once in the morning and once in the evening (watering 4 catties, don't do much) fertilizer, headache Tea still don't pour, you move the pot to the toilet, fill it with water a few times or change the top soil. Fertilization comes according to the season, spring is the growing period, you need a lot of nutrients, just fertilize, you don't need it in summer, you don't need to fertilize in autumn, you don't fertilize in winter, you can do it 2-3 times a year. Just keep it in the house in the winter, don't let him get cold.

The peace tree is very easy to raise, and you can basically do this.

Orange Tree;; It is also watered regularly, basking in the sun, pouring the tea water drunk into it, and pruning the leaves when you have time. Change the soil in autumn. Basically, the young leaves will be evergreen.

The main reason should be the lack of light, poor indoor air circulation, this is the most important factor, not to mention more, nothing to move the flowers outside to see the sun.

Teach you three tricks to keep the leaves of green plants from yellowing!