What are the causes and solutions for the yellowing of evergreen leaves?

It is very likely that the plant is deficient in nutrients, so nitrogen and potassium fertilizers should be supplemented in time to promote the growth of plant rhizomes, appropriate watering, and keeping the soil moist and placed in a ventilated place.

Normal leaf fall generally appears on the leaves at the bottom, and such yellow leaves can be removed in time. For some plants that need fertilizer to water, do thin fertilizer and apply it frequently, and if the amount of fertilizer is large, try fertilization. There is no problem with fertilization this time, add a large amount next time, and there is no problem with Ji Xian, and then add until there is a problem, you can find the critical point of fertilization.

Now the normal yellow leaf phenomenon.

During the normal growth process of plants, they will undergo metabolism, and the leaves will age after a period of growth, change and then fall into the leaves. For some deciduous trees or shrubs, there will be a large number of yellow leaves in autumn.

Evergreen is an evergreen plant, evergreen in all seasons, and there will be no concentrated defoliation, but during the growth period, yellow leaves and defoliation will occur from time to time, which is normal defoliation.

Normal leaf fall generally appears on the leaves at the bottom, and such yellow leaves can be removed in time. Then there is the abnormal defoliation, abnormal yellow leaves and maintenance related, mainly the following situations.

1. Yellow leaves with damaged roots.

There are two causes of root damage, water accumulation and hypertrophy.

The root system is the channel through which plants absorb nutrients and water, and when the root system is damaged, the transport channel is blocked, and there is no nutrients in the aboveground parts**, and there will be poor growth. Yellowing of leaves.

The soil with large soil clay is prone to excessive watering and long-term water accumulation.

Therefore, we will emphasize the importance of soil in raising flowers, which generally requires ventilation and good drainage, so that the soil is not prone to water accumulation.

Hypertrophy and root damage are caused by excessive fertilization at one time, resulting in root burning. The amount of fertilization is not easy to grasp, the fertilization is less and has no effect, and the fertilization is too much to produce fertilizer damage.

I usually do this, for some plants that need fertilizer to water, do thin fertilizer and frequent application, and large fertilizer needs, try to fertilize.

There is no problem with fertilization this time, add a large amount a little next time, there is no problem, and add until there is a problem, you can find the critical point of fertilization.

Second, the nutritional deficiency of yellow leaves.

Whether it's a plant, an animal, or a human, growth requires nutrients. However, the nutrition of plants is still a little different from that of people, and after people eat food, they can provide nutrition.

However, plant nutrition is produced by photosynthesis, light, fertilizer, water, air, etc. are all catalysts for photosynthesis, as long as photosynthesis is carried out smoothly, organic matter can be synthesized for plant growth.

Therefore, when we look at the point of undernutrition, there are many cases.

Insufficient fertilizer, insufficient light, and insufficient air will all affect the consumption of photosynthesis and cause nutritional deficiencies.