The leaves of succulents fall off at the slightest touch
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In summer, it is common to encounter the situation where the leaves of succulents fall off at the slightest touch. But why does this happen? Let's take a look at the summary of excessive succulents and see what aspects need attention and why this phenomenon occurs.
The originally鹿角-like autumn beauty has now withered to such an extent
This kind of problem is often caused by changes in the environment, such as high or low temperatures, lack of light, sudden weather changes, soil积水, or lack of nutrients. We call this kind of problem stress response or physiological disorder. The same is true for plants. Plants do not have a nervous system, and all their responses depend on the coordination of various plant hormones in their bodies. Sometimes, some sudden external stimuli can cause plants to secrete excessive amounts of plant hormones. When these excessive hormones are not used up, they can have some counterproductive effects, leading to physiological disorders in the plant body and causing various disease-like phenomena.
About to fall off when I'm not looking, I'm afraid to touch it
Let's start with the phenomenon of succulents' leaves falling off for no reason. In fact, it is very common for flowers, trees, and plants to shed leaves, especially for northern gardeners who are very familiar with the fallen leaves in autumn. This is actually a very normal reaction of deciduous plants to cold weather. Falling leaves can help trees reduce water consumption and easily survive the cold period of winter.
In fact, any plant has the ability to shed leaves when encountering special conditions. In our eyes, succulents are evergreen plants and should not shed leaves for no reason. However, if they encounter unbearable high or low temperatures, they may suddenly shed leaves.
The head of the garden has a small garden for raising plants, and they are all planted in wooden frames
When wet and hot weather occurs, succulents may encounter a situation where the water absorbed by the roots is far from making up for the water lost by the leaves. In this case, the plant's stress response is to shed leaves, as falling leaves can help succulents reduce this abnormal water consumption.
Of course, we can judge whether there is any rescue after the leaves fall~
1. Rule out black rot first
It is very important to rule out black rot first. Because shedding leaves is also a sign of black rot in succulents. We must first check the fallen leaves to see if there are any obvious black spots at the growing points of the leaves. These black spots may indicate that the leaves have been infected with black rot before falling off.
Some succulents may still be in the early stage of black rot, and the outer color of the stem does not show signs of black rot. However, the growing point of the leaves is always connected to the vascular bundle inside the stem. If the vascular bundle has been infected (which is a characteristic of black rot), there will also be a small black spot at the position of the leaf growing point. If it is still unclear whether it is black rot, you can cut off a side bud and see if there are signs of black rot on the cross-section of the stem. If it is black rot, it should be cut off as soon as possible.
Broken by rain, but not too ugly
2. Rule out other fungal diseases
Some fungi are parasites on the roots of leaves. Observe the back of the fallen leaves, and if you find black or dark brown things attached to the end near the growing point of each fallen leaf, these are molds. In more severe cases, the root of the fallen leaves is directly rotting, showing a soft and rotting phenomenon.
If this is the case, the shedding of leaves is caused by fungal infection. At this time, you should use a broad-spectrum external fungicide, such as mancozeb, to spray on the leaves. The spray must be evenly distributed, especially the gaps between the leaves should be sprayed.
This treasure is still beautiful
3. Diagnose as physiological disorder
After ruling out black rot and other fungal diseases, you can deal with the succulents as a physiological disorder. Do not intentionally touch the leaves off and try to keep the leaves on the branches as much as possible. These leaves do not have diseases; they are just overreacting to the high temperature and humidity environment.
Avoid浇大水 for these succulents. Do not let the potting soil be too dry or too wet. For succulents that cannot withstand too much stimulation, any sudden environmental change may exacerbate the shedding of leaves. If you have space on the windowsill in your bedroom (or any other well-lit indoor environment), you can move the succulents to the windowsill for care. You can also enjoy the cool air conditioning at night. After a period of quiet care, the excessive abscissic acid will gradually be consumed, and the remaining leaves will also become stronger.
Slightly sunburned
Do not move the succulents frequently, such as moving them out in the morning and back in at night, or moving them out at night and back in the morning. These折腾 are not suitable. Any vibration may cause fragile leaves to fall off more, and drastic changes in the environment may cause the succulents to produce more abscissic acid, leading to more intense leaf shedding. The watering strategy should be to water frequently with a small amount of water, keeping the potting soil in a slightly damp state. If the stem of the succulent has no leaves left, you can choose to cut off the top bud to further reduce consumption. If there is enough nutrients retained in the stem, new buds will sprout once the external conditions stabilize.
This article shares the complete introduction of succulent leaves falling off at the slightest touch for everyone to learn and understand!