What are the reasons for the cactus turning yellow
Abstract: This article discusses the reasons why cacti turn yellow and experiences in the proper maintenance of cacti, with detailed introduction below.
Reasons
Overwatering
The potting soil is in a consistently overly wet state, causing severe hypoxia, and the cactus gradually rots, obstructing the normal absorption of nutrients and water, resulting in yellowing and shedding of the leaves. At this point, watering should be stopped, and fertilization should be paused, maintaining soil ventilation.
Drought and Dehydration
This is the opposite of the above, caused by uneven watering, affecting the cactus's absorption of water, leading to dark yellow leaves without luster, and gradual yellowing and shedding from bottom to top. At this point, watering or sprinkling should be stopped, and the cactus should be kept in suitable conditions to gradually recover.
Long-term lack of fertilizer
After a long period without changing the soil, it is time to repot and gradually increase the application of compound fertilizer.
Over-fertilization
Due to excessive fertilization, the old leaves gradually fall off, at which point fertilization should be stopped, water should be increased moderately, and immediate repotting should be done, with the soil clump rinsed with water.
High temperature and heat
The cactus should be promptly moved to a cool and well-ventilated place.
Excessive shading
Due to long-term placement in a shaded area, insufficient sunlight is absorbed, and it is necessary to move it to a well-ventilated and sunny location.
What are the reasons for the cactus turning yellow
Soil and water too alkaline
In the northern regions with alkaline soil and water, there is a lack of soluble iron elements, so the needle leaves will gradually turn yellow. It is necessary to water with alum fertilizer.
Stuffy and airtight
Reasonable pruning should be applied to allow light penetration. Due to the lush growth of branches and leaves, it is easy to cause leaf shedding, so pay attention to ventilation and light.
Air too dry
If the air is too dry, attention should be paid to sprinkling water to appropriately increase air humidity.
Improper temperature
With the change of seasons, the indoor temperature also changes accordingly, so it is important to adjust the room temperature to a suitable level.
Soil too acidic
The loss of chemical elements in the soil causes the soil to become acidic, and it is necessary to apply alkaline solutions such as calcium magnesium phosphate.
Disease and pest infestation
Bacteria can easily cause leaf spot disease, leading to yellowing and shedding of branches and leaves. Timely spraying of pesticides for prevention and control is necessary.
Strong stimulation
The concentration of pesticide spray is too high, causing toxic gases that pollute, leading to overall withering. Pesticides should be used rationally to prevent air pollution and make correct judgments for appropriate treatment.
The above are the reasons why cacti turn yellow and the related explanation of the proper maintenance methods for cacti, hoping to bring a little help to your life!