What's wrong with the black stems of potted roses?

1. Infection with black spot

Reason: Around April to July, the plant may be infected with black spot disease. At first, only small purple-brown spots will appear on the leaves, which will gradually expand and become more serious. In the later stages, the branches and trunks will also have black spots, causing the branches and trunks to turn black.

Solution: This disease is mainly preventive. Clean up fallen leaves in time and spray foliar fertilizer regularly to promote plant growth and reduce the chance of infection. If the disease occurs, you need to spray medicine.

2. Excessive Fertilization

Reason: Potted roses require more nutrients, but you need to be careful when fertilizing. If too much fertilizer is applied or the concentration of the fertilizer is too high, the roots will have difficulty adapting, causing the roots to be burned, rot, and the branches to turn black.

Solution: If you find that you have applied too much fertilizer, stop immediately, trim the roots, and replant them in pots to promote the growth of new roots.

3. Excessive water

Reason: Roses are drought-tolerant and water-averse plants. If too much water is applied, water will accumulate in the soil, causing the roots to rot and problems with the branches.

Solution: Promote evaporation and drainage of water. If the roots are rotten, they must also be treated.