Causes of black spots on hydrangea leaves. Methods to prevent black spots on hydrangea leaves. Daily maintenance points for preventing black spots on hydrangea leaves. As a traditional ornamental plant in our country, hydrangea is deeply loved by gardening enthusiasts due to its unique flower shape and rich colors. During the maintenance process, the problem of black spots on hydrangea leaves has caused headaches for many flower friends. This article will provide you a detailed analysis of the causes and prevention methods of black spots on hydrangea leaves, and help you raise a healthy and beautiful hydrangea. Causes of black spots on hydrangea leaves 1. Bacterial infection: Black spot on hydrangea leaves is caused by fungi. When hydrangea leaves are infected by bacteria, black spots will appear.
2. Pests: Black spots on hydrangea leaves may also be caused by pests such as aphids and red spiders, causing black spots on the leaves.
3. Improper maintenance: Factors such as too much watering, improper fertilization, and insufficient light may lead to black spots on hydrangea leaves. Prevention and control methods of black spots on hydrangea leaves 1. Clean and maintain the environment: Keep the hydrangea growing environment clean, clean up sick leaves and dead leaves in time, and reduce the spread of bacteria.
2. Control watering: Reasonably control watering to avoid excessive watering causing root rot and causing black spots on hydrangea leaves.
3. Reasonable fertilization: According to the growth needs of hydrangea, reasonable fertilization should be carried out to avoid excessive fertilization causing fertilizer damage.
4. Prevention and control of pests and diseases: Regularly inspect hydrangea plants and promptly control pests and diseases found. For fungal diseases, pesticides such as carbendazim and thiophanate-methyl can be used to spray; for pests, pesticides can be used to spray.
5. Improve light conditions: Ensure that hydrangea plants can fully receive light and avoid exposure to dark environments for long periods of time.
6. Trim the diseased branches: After discovering black spots on hydrangea leaves, prune the diseased branches in time to prevent the spread of the disease. Points for daily maintenance to prevent black spots on hydrangea leaves 1. Choose a suitable growth environment: hydrangea prefers semi-shaded environments, avoid direct sunlight, and maintain good ventilation.
2. Control watering: Water should be done in the right amount to avoid standing water and keep the soil moist.
3. Reasonable fertilization: Fertilization should be balanced and excessive fertilization should be avoided.
4. Regular inspection: Regularly inspect hydrangea plants to detect and deal with pests and diseases in a timely manner.
The problem of black spots on hydrangea leaves is not unsolvable. As long as we understand the reasons and take corresponding prevention and control measures, we can effectively avoid this problem. I hope this article can help you and wish you a beautiful and healthy hydrangea!