What to Do When Hydrangea Leaves Curl and Burn
Hydrangeas are beloved by gardening enthusiasts for their large flower balls and colorful blooms, but when the leaves start to curl and wither, it often leaves gardeners at a loss. This abnormality may be caused by a variety of factors such as temperature, ventilation, and watering and fertilizing, which require systematic analysis for precise response.
I. Environmental Factor Adjustment
High-Temperature Burn Treatment Plan
When temperatures consistently exceed 30°C, hydrangea leaves may exhibit dehydration curling, with brown edges. It is recommended to set up a shade net in the summer,配合 foliar sprays in the morning and evening (avoiding the high-temperature noon), and moving potted plants to a north-facing balcony or under tree shade.
Optimizing Ventilation Systems
Confined environments can lead to fungal diseases, so it is recommended to maintain a plant spacing of 30cm or more, open windows for ventilation 2-3 times a day when indoor caring, and use a small circulating fan during the rainy season to enhance air circulation. Special attention should be paid to ensuring over 60% humidity during the period when new leaves are unfolding.
II. Water and Fertilizer Management Tips
Scientific Irrigation Techniques
Adopt the "wet and dry" method of watering, watering thoroughly every 3 days in spring and autumn, and twice a day in summer (200-300ml each time). If waterlogging is found, immediately remove the pot and dry the roots, use bamboo sticks to poke holes in the soil ball to accelerate drainage, and prune and replace the soil in case of severe root rot.
Precise Fertilization Strategy
Apply diluted 1000 times "Flower More 2" every half month during the growing season, and add phosphorus and potassium during the budding period. If fertilizer damage occurs, flush the roots with clean water for 3 consecutive days, and use EM bacterial solution to repair the soil environment.
III. Comprehensive Pest and Disease Control
Early damage by red spiders appears as pinhead-sized yellow spots on the back of leaves, which can be treated by spraying 10ml of neem oil diluted in 1L of water weekly. For the (T-J) disease, it is recommended to cut off the diseased leaves at the early stage of infection and alternate the use of mancozeb and tebuconazole, focusing on the back of the leaves.
Through three-dimensional regulation of temperature, light, and water-fertilizer, combined with regular pest and disease inspections, hydrangeas can maintain a healthy and glossy leaf condition. It is recommended to use seaweed extract for foliar care monthly, and retain 2-3 pairs of buds during winter pruning to lay the foundation for healthy new leaves next year.