Hydrangeas can wilt for several reasons including lack of water, overwatering, heat stress, transplant shock, root damage, pest or disease problems, and nutrient imbalances. Wilting often indicates stress from environmental or care issues. For example, if the soil is too dry, hydrangeas cannot maintain water pressure in the plant cells, causing drooping. Conversely, overly wet soil can lead to root rot, impairing water absorption and also causing wilting. Heat stress from intense sunlight can cause rapid water loss, leading to temporary wilting especially in hot afternoons. Newly transplanted hydrangeas may wilt due to root disturbance and adjustment to new conditions. Excess nitrogen fertilizer can also weaken the plant, making it prone to wilting. Proper care like deep watering, mulching, avoiding excessive sun exposure, balanced fertilization, and monitoring for pests can help prevent wilting and revive affected plants.
