Why is the allium yellow leaf, and what to do if the allium leaves turn yellow

Causes and solutions of yellow leaves of allium orchid:

1. Normal phenomenon

Reason:The yellowing of the leaves of the allium orchid may be a normal physiological phenomenon, because of the metabolism of growth, the old leaves under it will gradually age and turn yellow.

Workaround:If you find that there are aging leaves on the plant, you can remove these old leaves first, and then pay attention to good maintenance and management, without special interference.

Second, the soil is unsuitable

Reason:Allium orchid is suitable for growing in loose soil, if the soil is not suitable and not breathable, the roots cannot breathe, which may cause root rot, which will affect the leaves.

Workaround:In order to provide suitable soil for allium orchid, it is required to be loose, breathable and have good drainage.

3. Overwatering

Reason:Allium orchid can not tolerate moisture, once watered too much, the roots are soaked in the soil with more water content and cannot breathe, which will lead to root rot in the long run, and will also cause yellow leaves.

Workaround:Remove the yellow leaves, then control the watering, loosen the soil appropriately, and put it in a cool and ventilated place.

Fourth, improper lighting

Reason:It is suitable for growing in an environment with astigmatism, and if it is kept indoors for a long time, it will cause yellowing if it lacks sunlight. If accidentally exposed to the scorching sun, it will also cause yellow leaves.

Workaround:It can be kept in a well-lit place, without lack of sunlight, and also block strong light.

The yellow leaves of the allium orchid are estimated to be insects in the roots, sprinkle some medicine, or soot water.

If its leaves turn yellow, it is likely that the roots are not breathing well, and it is necessary to see if it is rotten: take it out, remove the rotten roots and leaves, apply some plant ash to the area of the root incision, then dry it and plant it in a pot. To keep the soil in the pot moist and not too dry, cover it with plastic film for a week, and then take care of it normally after uncovering, let it see more sunlight and maintain the temperature, so that it can quickly grow roots.

In the summer, many of its plants on the ground will die, and it will not grow again until autumn. In the hot season, when the daytime temperature is above 35, if you put it directly under the sun, it will stop growing or enter semi-dormancy, and the leaves will slowly turn yellow and fall due to burns. So in the summer months you should block it out half of the sun.

If it is placed in the house, try to put it in a bright area, such as a balcony with better light, etc., and maintain it in the house for about two months, it should be moved to a shaded position outside the house for about a month, so as to alternately change, if it is winter, it should be kept warm.

If it is caused by too much watering, you should control the watering, loosen the soil properly, and don't push too hard, so as to help it drain, breathe, and help its roots grow. If the soil is white or has cracks, water it thoroughly, it is afraid of too strong light, semi-shady areas are best, and do not keep it in the house all the time, so that the leaves will also turn yellow, you can often move outside the house to bask in the sun for an hour, preferably in the morning.

In fact, it is very easy to raise, if its leaves have withered, but the roots have not died, you can cut off its leaves, put it in a cool place to let its leaves grow and then slowly see the sun. It works better in soil culture. If it is hydroponic, his will also turn yellow easily.

<> allium orchid does not grow leaves due to the season, it will stop growing in the summer when the temperature is higher than 35, and in the autumn it will slowly grow leaves. It may also be caused by soil discomfort, so it should be replaced with new soil in time. Pest infestation will also cause it to not grow leaves, and it needs to be sprayed with special drugs in time**.

1. Seasonal reasons.

Allium orchid does not grow leaves may be the reason for the season, it is a plant that is not resistant to high temperatures, when the temperature is higher than 35 in summer, it will stop growing, and the leaves that grow on the ground are also easy to wither, at this time the plant needs to be moved to a cool and ventilated place for maintenance, and in autumn it will slowly grow leaves.

2. Soil discomfort.

Allium orchid does not grow leaves may also be caused by soil discomfort, it likes to grow in fertile, sticky and well-drained soil, if you do not change the soil for a long time, the soil will become compact, fertility will be insufficient, so that the roots of allium orchid can not absorb nutrients, resulting in it does not grow leaves, at this time to replace the new soil for its key potatoes in time.

3. Caused by insect pests.

Allium orchid does not grow leaves may also be caused by insect pests, it is easy to be attacked by Spodoptera exigua, and when it is serious, it will eat all the stems and leaves on the ground of the plant, although it will not cause the death of allium orchid, but it will cause its growth to become particularly slow, so at this time it is necessary to spray with special drugs in time**.

1. The water holding capacity of the soil is too large.

The ground is too wet, and the soil holds too much water. The roots of the shallots could not breathe normally, and there was a phenomenon of death. In this way, the leaves of the shallots on the ground part will naturally turn yellow.

2. The air humidity is too high.

The surface of the chives leaves originally has a waxy layer to protect the moisture from being lost. In autumn, excessive rainfall and air humidity limit transpiration. The absorption capacity of the roots of the chives is weakened, and the nutrients of the leaves are lacking for a long time, and the leaves of the chives turn yellow.

3. Caused by pests and diseases.

The ground is too wet, and soil-borne diseases are very serious, causing some diseases to occur. In addition, there is too much rainfall, and some epidemic diseases will also occur, causing the leaves of the chives to turn yellow.

4. Failure to control pests and diseases.

After the seedlings of chives are planted upside down, if they encounter heavy rain, the number of pesticides applied by farmers will be reduced accordingly, and the pests and diseases will be very serious, and it is not convenient to prevent them. If there is too much water in the field, and there is a lack of envy and no timely drainage, root rot will also occur.

The flowering period of the goldenrod is in July and September every year, and the yellow-flowered allium is a perennial green root bulb plant, the bulb can be up to centimeters, and the outer skin is black-brown. The goldenrod orchid adopts the method of dividing the plant to flourish lead breeding, the goldenrod orchid likes to live in a warm and humid environment, and needs to provide enough water during the maintenance period, and the temperature should be controlled between 20 and 30 during maintenance.

The flowering period of the goldenrod is in July and September every year, and the goldenrod is a perennial green root bulbous plant with bulbs up to cm. The skin is dark brown and the fruiting period is in July and September every year.

Yellow onion Yellow onion orchid is generally propagated by the method of branch propagation. In early spring, select the mother plant with a strong root system, take it out of the pot, divide it into three plants with a knife, and do not water too much after the division is completed, and place it in a ventilated and cool place for maintenance. Proper light exposure during maintenance can promote its growth and development.

Goldenrod is suitable for living in a warm, moist and sunny environment. Preferring loose and fertile acidic sandy soil, the goldenrod orchid is more shade-tolerant and drought-tolerant, but it needs to be provided with sufficient water to promote its growth and development during the growth period. Proper water control is required in winter.

When breeding goldenrod orchid, it is advisable to control the temperature between 20 and 30, which also has a certain cold resistance, and can live in an environment above minus 10 degrees. In the north, when cultivating yellow allium orchids, continue to make cold protection treatment.

Summary. Dear, we found that it is easy to get sick in the process of onion planting, such as dry rot, stem rot, aspergillus niger, once infected, it will lead to yellow leaves, it is necessary to fertilize reasonably, strengthen fertilizer and water management, enhance the resistance of plants, and spray the corresponding agents, in order to completely eliminate the germs. In addition to the cause of the disease, there may also be maintenance problems, especially in terms of fertilizer and water, which need to be applied reasonably, increasing or decreasing according to the situation.

Dear, we found that it is easy to get sick in the process of onion planting, such as dry rot, stem rot, aspergillus niger, once infected, it will lead to yellow leaves, it is necessary to make reasonable fertilization, strengthen fertilizer and water management, enhance the resistance of plants, and spray the corresponding agents, in order to completely eliminate the germs. In addition to the cause of the disease, there may also be a problem with the maintenance of lead, especially in terms of fertilizer and water, which needs to be applied reasonably, and increased or decreased according to the situation.

Do you have a botanical expert?

Reasons for the dried green onions and yellow leaves:

1.Excessive soil moisture. Green onions are native to Central Asia, West Asia and other places, and are resistant to drought and excessive humidity.

Especially in the slow growth stage of high temperature, drought will not cause death, and excessive soil moisture often causes waterlogging and death of plants, which is the saying "green onions do not die and drown". This year, the summer and autumn rains are more frequent, although the rainfall is not large, but the soil has been in a moist state, causing waterlogging, suffocating the root system, and the aboveground part of the leaf yellowing.

2.The air humidity is too high. There is a layer of wax on the surface of green onion leaves, which has the effect of protecting water dispersion and loss, and the transpiration effect is small.

This year's summer and autumn have more cloudy and rainy days, and the air humidity is high, which inhibits transpiration. As a result, the absorption of the root system is reduced, and the nutrients brought to the leaves by absorbing water - nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, zinc and other fertilizer elements - are also greatly reduced. Long-term lack of fertilizer elements can also cause yellowing of leaves.

3.The disease is severe. Due to years of continuous cropping, soil-borne diseases are serious, resulting in a large number of soft rot, blight, root rot and downy mildew. In addition, excessive soil moisture exacerbates the damage of diseases, which can cause dry and yellow leaves.

Measures to prevent dried green onions from yellow leaves:

1.Deep ploughing and drainage, timely drainage. Generally, it is required to plough 30 cm.

When there is no deep tillage condition, the soil conditioner can be applied with water at the time of planting, or in August and September - no deep tillage, 200 grams per mu, about 20 days, can make the soil 50 100 cm deep loose and permeable. The soil is loose, the general small and medium-sized rainwater seeps down, the surface does not accumulate water, prevents waterlogging, and reduces the humidity; The root system is well developed, the plant is robust, the disease resistance is strong, and the waterlogging damage is reduced.

2.Top dressing outside the roots. 8 In September, combined with the prevention and control of pests and diseases, spray a nutrient solution every 10 days - 2 thousandths of nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, zinc and other fertilizer elements to prevent the lack of nutrients.

3.Spraying the plant growth regulator - natural brassinin Shuofeng 481 every 10 20 days can promote photosynthesis, improve nutrient production, improve disease resistance, and reduce yellow leaf phenomenon.

4.In addition to the use of crop rotation to prevent and control soil-borne diseases, it can also be sprinkled with carbendazim, methyl tobuzin and other agents when planting green onions, or the above agents can be irrigated during the growth period to prevent root rot and blight. Soft rot should be sprayed with agricultural streptomycin for control.

The normal green onion leaves naturally turn yellow, which should be caused by lack of water, and it must be that the land is dry. Try pouring a little water.

Normal natural yellowing from the leaves, this may be because the temperature is too high, or because of lack of water, so it should be a concern.