Rose leaf
The young leaves are dim and dark yellow, the old leaves have no obvious change, the branches are thin and yellow-green, and the new shoots grow abnormally, indicating that there is too much watering. Yellow means that the leaves are dry and withered at the tip or edge, the old leaves are yellow and fall off from the bottom, but the new leaves grow relatively normally, indicating that the rose is short of water.
Solution: If you water too much, take the flowers out of the pot, put them in a ventilated and cool place, and put them back in the flowerpot after the soil is dry. In the future, we should pay attention to the principle of "don't dry it, water it thoroughly".
2. Nutrition problems
Nitrogen fertilizer promotes leaf growth and phosphorus fertilizer promotes flowering. Lack of fertilizer in Chinese rose will lead to malnutrition and illness. Or use immature fertilizer, resulting in burning roots.
Solution: Apply decomposed organic fertilizer, such as chicken manure, cow dung and cake fertilizer. Because the small basin lacks nutrients, it is immediately replaced with a large basin and filled with nutritious soil. It is forbidden to apply immature organic fertilizer and high-dose chemical fertilizer, so as not to cause plants to burn their roots, wither and die. It is suggested to use potassium dihydrogen phosphate in Euonymus fortunei leaves when flowering, which can not only increase nutrition, but also increase the ornamental value of plants. High absorption and utilization rate and good effect.
3. Viral yellow leaves
The rose has been invaded by the virus, and the leaves will not stretch and turn yellow.
Solution: It is feasible to spray virus, toxic dew and other solvents in time for prevention and control, and pay attention to comprehensive maintenance and management in the future to ensure healthy and robust plants.
4. Basin soil problems
The hardening of basin soil leads to poor soil permeability and difficulty in breathing at the roots of plants, which affects plant growth.
Solution: Insert a dozen holes in the basin with bamboo sticks to ensure the root is breathable.
5. Poor ventilation
Rose likes the air circulation environment. Under the environment of insufficient ventilation and sultry air, the leaves of rose will turn yellow and grow yellow spots. ;