Causes and treatment methods of yellowing and non-flowering of Catharanthus roseus leaves

The main results are as follows: (1) lack of light leads to yellow leaves and no flowering.

Treatment: Catharanthus roseus needs to be kept in a sunny and warm place during daily maintenance. If you stay in a shady environment for a long time, it will cause overgrowth of plants, yellowing of leaves and non-flowering. Especially when the sun is insufficient in winter, the light can be filled artificially under certain conditions, which can make the plant beautiful in shape.

(2) the basin soil has not been turned over for a long time, the soil is loose, and the alkaline soil leads to yellow leaves and no flowering.

Treatment method: Catharanthus roseus is not tolerant to alkaline soil, so it is necessary to choose acidic soil rich in humus, so that Catharanthus roseus blossoms luxuriantly and has luxuriant leaves and branches. In the case of alkaline basin soil, the soil is hardened, the water seepage is poor, the ventilation is poor, and the temperature rises slowly, which often affects the reproduction of microorganisms and the decomposition of nutrients, resulting in the lack of various trace elements needed for the growth and development of flowers, and the plants will grow badly gradually. The leaves are yellow and do not bloom.

When Catharanthus roseus is watered, hard water and alkaline water can not be used in the water body, especially the soil in the northern water body is alkaline. In addition to daily watering, thin alum fertilizer water should be watered every 15 days. The soil is changed to sandy soil which is partial, fertile and well drained, and the leaf color of the plant will turn green soon.

(3) improper management of water and fertilizer leads to yellow leaves and no flowering.

Treatment: Catharanthus roseus likes a humid environment, but avoid stagnant water in the basin, otherwise poor drainage, too much water, lack of oxygen in the soil, easy to cause rotten roots, tender leaves first yellow. If the basin soil is too dry and half of the water is not thoroughly watered, the leaves will be dull and the old leaves will be yellow first. At the same time, if the soil has not been fertilized or changed for a long time, the plant will be thin and the leaves will turn yellow. at this time, attention should be paid to changing the basin soil in time and applying thin fertilizer every two weeks.

(4) low temperature leads to yellow leaves and no flowering.

Treatment method: the suitable growth temperature of Catharanthus roseus is 20-33 ℃. When the temperature is lower than 15 ℃, the growth stops to enter the dormancy period, and when the temperature is below 5 ℃, the plant suffers frost damage. After the beginning of winter, Catharanthus roseus needs to be moved to indoor maintenance, keep warm and maintain a suitable temperature.

What to do about the yellowing of Catharanthus roseus leaves? causes and solutions of yellowing of Catharanthus roseus leaves

Catharanthus roseus is a very common flower plant. What if the leaves of Catharanthus roseus turn yellow? Next, let's talk about the reasons and solutions for the yellowing of Catharanthus roseus leaves.

1. Soil alkalinity.

Catharanthus roseus does not have a high demand for soil, but avoid alkaline soil. Planting Catharanthus roseus with alkaline soil will lead to Catharanthus roseus leaves yellowing and not blooming.

Solution: the acidity and alkalinity of the planted soil should be tested, and if the soil is partial to alkali, it should be treated.

2. Poor soil permeability.

Poor soil permeability is also the reason for the yellowing of Catharanthus roseus leaves. Many people choose to plant Catharanthus roseus with high stickiness, poor water permeability and poor air permeability, which makes no problem in the short term, but for a long time, the poor permeability of the soil results in poor breathing in the lower roots of Catharanthus roseus, resulting in frequent yellow leaves and fallen leaves.

Solution: choose sandy soil with good drainage performance to plant, but also pay attention to not watering too much.

3. Overwatering

Catharanthus roseus avoid dampness and fear of waterlogging, basin soil watering should not be too much, otherwise it will affect root breathing and cause old leaves yellow, new leaves yellow.

Solution: strictly control watering, it is better to dry, and pay attention to drainage in rainy season.

4. Too little watering

Catharanthus roseus can not be watered too much or too little, too little or not watered thoroughly for a long time, the plant can not absorb enough water, the new leaves will wilt, and the old leaves will turn yellow and fall off.

Solution: pay attention to watering, basin soil can be watered after dry, watering should be thoroughly.

5. Excessive fertilization

Many people worry about growing flowers at home for a long time. If there is not enough fertilizer, they will occasionally put some fertilizer or something into the potted soil, hoping to absorb more flowers. In fact, too much fertilizer will cause root burning and damage the root system. The whole Catharanthus roseus is depressed, grows slowly, blossoms less, and its petals become smaller.

Solution: Catharanthus roseus can be applied alternately by compound fertilizer and liquid fertilizer, and don't apply fertilizer casually at other times.

What to do about the yellowing of Catharanthus roseus leaves? the causes and solutions of Catharanthus roseus leaves withering

Catharanthus roseus is a kind of traditional Chinese medicine in China, which has the effect of cooling blood and lowering blood pressure, calming and calming the mind. And its ornamental value is also very high, colorful, it is easy to attract people's attention. Although its family planting method is not very difficult, some flower friends still reflect that the leaves of home-grown Catharanthus roseus often turn yellow, affecting their appearance. In this case, we can only analyze the reason first.

What if the leaves of Catharanthus roseus turn yellow

1. The reason is that the soil is alkaline. Catharanthus roseus does not have a high demand for soil, but it is suitable for growing in acidic soil, alkaline soil will lead to poor growth of Catharanthus roseus, causing leaves to yellowing and not flowering.

Solution: the acidity and alkalinity of the planted soil should be tested, and if the soil is partial to alkali, it should be treated.

2. Reason: poor soil permeability. Poor soil permeability is also the reason for the yellowing of Catharanthus roseus leaves. Many people plant flowers with high soil viscosity and poor water permeability. There is no problem with this kind of soil in the short term, but over time, the poor permeability of the soil results in poor breathing in the lower roots of Catharanthus roseus, resulting in frequent yellow leaves and fallen leaves.

Solution: choose sandy soil with good drainage performance to plant, but also pay attention to not watering too much.

3. Reason: too much watering. Catharanthus roseus avoid dampness and fear of waterlogging, basin soil watering should not be too much, otherwise it will affect root breathing and cause old leaves yellow, new leaves yellow.

Solution: strictly control watering, it is better to dry, and pay attention to drainage in rainy season.

4. Reason: too much fertilizer. Occasionally put a little fertilizer or something into the basin soil, hoping to absorb more flowering, this way is correct, but the fault lies in the frequency of fertilization, if frequent fertilization, Catharanthus roseus is very difficult to fully absorb, fertilizer remains in the soil, always around the root, resulting in the whole Catharanthus roseus malaise, slow growth, less flowering, petals smaller.

Solution: Catharanthus roseus can be applied alternately by compound fertilizer and liquid fertilizer, and don't apply fertilizer casually at other times. Watering the next day after fertilization promotes the absorption of nutrients.

5. Reason: too little watering. Catharanthus roseus can not be watered too much or too little, too little or not watered thoroughly for a long time, the plant can not absorb enough water, the new leaves will wilt, and the old leaves will turn yellow and fall off.

Solution: pay attention to watering, basin soil can be watered after dry, watering should be thoroughly.

Causes of leaf withering of Catharanthus roseus and its solution

1. Reason: pot transplantation. What if your new Catharanthus roseus leaves suddenly withered? In fact, this is not your problem, which shows that the potted flowers have just been planted or just transplanted, but as long as the leaves are not particularly dry and serious, Catharanthus roseus will slowly recover.

Solution: the newly transplanted plant takes about a month to adapt, and then it can basically grow in about a month. During this period, you need to take patient care of Catharanthus roseus, it is alive, and sometimes you feel that flowers are also spiritual!

2. Reason: too much watering. In potted Catharanthus roseus, long-term waterlogging will suffocate and erode the roots, which can not absorb fertilizer and water normally, which will cause the leaves to wither and turn yellow.

Solution: if you see the yellow leaves, it is best not to water them again. Loosen the soil in the basin and let it dry in a ventilated and dry place. Let the moisture left at the bottom evaporate as soon as possible. It is best to dry and water again!

3. Reason: lack of water. If you see the leaves wilting, yellow and soft, you feel like you don't have the spirit, then this is because of the lack of water.

Solution: sprinkle a moderate amount of water on the leaves of Catharanthus roseus, or place a pot of water around the flowers to increase the humidity of the air nearby.

Is Catharanthus roseus poisonous

Yes, Catharanthus roseus is poisonous. Catharanthus roseus is a plant of oleander family. Like oleander, its juice is poisonous, among which flowers are the most toxic.

Catharanthus roseus contains more than 70 alkaloids, such as vincristine, vincristine and isovincristine, among which vincristine has an inhibitory effect on human white blood cells and will poison the nervous system, while isovincristine will mutagenesis in the human body. leading to malformations.

But in general, it will only be poisoned when the wound touches the sap or eats the sap by mistake. Slightly touching the flowers and leaves of Catharanthus roseus will not cause harm to the human body, as long as we usually pay attention to it, do not break the branches and leaves casually. If you accidentally eat Catharanthus roseus, it will cause leukopenia, thrombocytopenia, muscle weakness, limb paralysis and other symptoms.

When does Catharanthus roseus bloom

1. The flowering period of Catharanthus roseus is very long. Basically, when Catharanthus roseus blossoms, it begins from April to May and generally lasts quite a long time. It blossoms continuously from spring to autumn, and can even blossom continuously throughout the year, so it is called daily spring.

2. Catharanthus roseus a single flower does not last very long, usually a flower can bloom for 3-5 days.

The cultivation method of Catharanthus roseus is not very difficult, so you can rest assured to plant a pot at home. In the process of breeding, it is best not to change the basin often, so as not to affect the growth of the plant. In addition, as the juice of Catharanthus roseus is toxic, we should pay attention to it in the process of maintenance, so as to avoid injury caused by accidental ingestion.