Hydrangeas typically wilt due to stress from several common factors: lack of water, overwatering, heat stress, transplant shock, root damage, or pest and disease problems. They are moisture-loving plants that need consistent, well- draining moisture in the soil. Wilting from lack of water happens when the soil is dry and the plant can't maintain its turgor pressure, especially during hot weather. Overwatering can also cause wilting by suffocating the roots and causing root rot, which prevents water absorption. Heat stress and excessive sun exposure make hydrangeas lose water quickly, causing wilting, sometimes temporarily during the hottest part of the day. Transplant shock can cause wilting if roots are damaged or disturbed. Additionally, pests like aphids and diseases such as root rot can cause wilting. Addressing the cause involves checking soil moisture, providing shade in extreme heat, improving drainage, mulching to retain moisture, and treating pests or diseases if present.
