Why do jasmine leaves turn black?

1. Overwatering

If its leaves are black, you are probably watering it too much. When many friends grow flowers, they are afraid that their flowers will lack water, so they will keep watering them. This will cause too much water and have the opposite effect. You know, usually when a plant is growing, its roots will absorb water and supply it to the leaves, so that the leaves can grow better. However, what you don't know is that in order for it to breathe, there must be sufficient air. If there is too much water, the air will become less, and the roots will stay in an overly humid environment for a long time, causing it to lack oxygen. In this way, the roots cannot supply water to the leaves well, which will cause its leaves to turn black. So you must water in moderation and never too much.

2. Caused by diseases

Jasmine is prone to some diseases, such as leaf spot, which is a disease that many flowers are very afraid of. Once it appears, many small brown spots will appear on the leaves at first, and then slowly expand into round or irregular shapes. It will also make the leaves infected with the disease become thinner and transparent, and black granular substances will slowly grow out, so that the leaves will turn black.

Prevention and control methods: If the leaves turn black due to this disease, timely prevention and control are needed. First of all, we can cut off its diseased leaves in time and destroy them, then remember to apply less nitrogen fertilizer and more phosphorus fertilizer, and finally spray it with medicine, which can play a good preventive and control role.

3. Excessive fertilization

Similarly, some people are afraid that their flowers are not getting enough nutrition, so they try to fertilize them desperately and give them the most nutrition. However, they do not realize that this will lead to an overabundance of nutrients, which will burn the plants and turn the leaves black. Therefore, the amount of fertilizer must be controlled.