Hydrangea care: managing wilting and summer heat stress

Hydrangeas may wilt during summer heat even when provided with regular watering. If the soil is moist but the leaves appear drooping, several underlying issues may be responsible.

Key causes for wilting in moist soil include root rot caused by overwatering, which prevents roots from accessing oxygen, and root overheating from intense sun exposure. Additionally, large hydrangea leaves can evaporate water faster than the roots can absorb it during peak midday heat, causing temporary wilting that often recovers by evening.

To maintain healthy plants, gardeners should check soil moisture manually rather than relying solely on a schedule and monitor for signs of root damage or excessive evaporation.