1、 Black spot infection

Reason: from April to July, you may be infected with black spot. At first, there are only small purple brown spots on the leaves, and then they will gradually expand and become more serious. In the later stage, there are black spots on the branches, resulting in the blackening of the branches

Solution: this disease is mainly prevention oriented. It is necessary to clean the fallen leaves in time and spray foliar fertilizer regularly to promote the growth of plants and reduce the probability of infection. If it occurs, it needs to be sprayed

2、 Excessive fertilization

Reason: potted roses need more nutrients, but attention should be paid to fertilization. In case of excessive fertilization or too high concentration of fertilizer, the root system will be difficult to adapt, resulting in burning of the root, rot of the root and blackening of the branches

Solution: if excessive fertilization is found, it shall be stopped in time, and the roots shall be trimmed and replanted into the flowerpot to promote the growth of new roots

3、 Excessive moisture

Reason: rose is a drought resistant and waterlogging resistant plant. If too much water is applied, there will be ponding in the basin soil, resulting in rotten roots and problems with branches

Solution: promote the evaporation and discharge of water. If the root is rotten, it should also be treated