The leaves of Polygonatum odoratum are yellow or even withered, which is caused by many reasons: diseases and insect pests, improper watering and fertilization, etc.
The main diseases and insect pests that lead to the yellow and withered leaves of Polygonatum odoratum are leaf spot, gray spot and purple wheel. These are basically fungal and pathogenic diseases and insect pests of Yuzhu, which will lead to the withering and death of Yuzhu seriously.
The growth environment and the frequency of watering and fertilization will also affect the growth of Yuzhu. Too dry or wet, too much fertilization will cause the leaves to turn yellow. This situation requires more scientific daily maintenance of Yuzhu, watering and fertilization according to the law, to ensure the growth of Yuzhu in the appropriate environment and temperature.
The main way to deal with the diseases and insect pests on the leaves of Polygonatum odoratum is to remove the withered leaves caused by the diseases and insect pests and deal with them intensively. At the same time, pay attention to the sanitation of planting environment and soil sterilization. For more information on the diseases and insect pests of Yuzhu and their treatment, please see another article of Xiaobian: the complete prevention and control methods of diseases and insect pests of Yuzhu.
Yuzhu is most afraid of ponding. If the soil is too wet for a long time, it will produce anoxia, which will hinder the absorption and respiration of nutrition at the root of Yuzhu. The scientific way is to control the amount of water and aerate the soil regularly.
If the short-term water shortage will cause the leaves to have no spirit, that is to say, wilt. In this case, a small amount of water is needed. Wait until the leaves recover a little (stand up) before watering normally.
In summer, Yuzhu should be kept away from the sultry environment (above 30 ℃), and in winter, too cold can also cause the leaves to turn yellow or even fall off (no less than 10 ℃). The scientific way is to ventilate more and avoid direct sunlight. Don't water in the afternoon in summer, the opposite is true in winter.
Excessive fertilization will lead to water loss and even death of the root of Polygonatum odoratum, resulting in rotten root, withered yellow and so on. The scientific solution is to use thin fertilizer. If the leaves turn yellow, stop applying fertilizer immediately and water more to filter the soil salt.
Well, that's the main reason why the leaves of Yuzhu are yellow. If your Yuzhu has the above condition, please help her quickly! More about Yuzhu family maintenance knowledge Reading: Yuzhu family planting and maintenance method details!
