What Causes the Blackening of Rose Stem
A small knowledge of life, introducing the experience of why the stem of roses turns black in the aspect of green plant maintenance. The following is a comprehensive introduction.
What Causes the Blackening of Rose Stem
The blackening of rose stems may be caused by diseases, in which case, special medications should be sprayed for treatment. Roses are not tolerant to waterlogging; if there is waterlogging in the soil, the rose stem may also turn black. It could also be caused by the application of excessive fertilizer, or by keeping the rose in a stuffy and hot environment during summer, which can also cause the stem to turn black.
1. -- Disease --
The blackening of rose stems may be caused by diseases such as stem blight. In this case, the blackened stems should be cut off to prevent the spread of the pathogen. Then, a special fungicide should be sprayed on the plant for treatment, allowing the rose to recover its health.
2. -- Overwatering --
Although roses require plenty of water for growth, they are not tolerant to waterlogging. If overwatered, the roots may rot, preventing the rose from absorbing nutrients and water, which eventually leads to blackening of the stem. Watering roses should be based on the dryness or moisture of the soil, preferably following the principle of watering when the soil is dry and moist.
3. -- Improper Fertilization --
The blackening of rose stems may also be caused by improper fertilization. For example, applying raw or concentrated fertilizer can easily cause fertilizer damage to the rose, leading to blackening of the stem. Therefore, when fertilizing roses, it is best to follow the principle of applying thin fertilizer frequently, and fertilization should be stopped during the dormant period of roses.
4. -- Stuffy Environment --
Roses prefer to grow in a warm and well-ventilated environment. In summer, when the weather is hot, if proper ventilation measures are not taken, roses may be in a stuffy environment, which can easily cause the stem to turn black. In this case, it is necessary to cool down and ventilate the roses promptly.
The detailed explanation shared above on why the stem of roses turns black is hoped to bring you help in green plant management!