Leaf scorch happens because hydrangeas get too hot. The placement doesn’t sound unusual; morning sun is all they need. But the temperatures are probably too lot for this plant that enjoys the cooler side of life. Also, water management can be a challenge. The “hydra” in hydrangea means they need to be watered consistently. They have a very large leaf surface area which results in higher water loss. In addition, hydrangeas lack the ability to regulate water loss under drought stress conditions. This can readily lead to wilting and the resulting leaf scorch.
Leaf scorch happens because hydrangeas get too hot. The placement doesn’t sound unusual; morning sun is all they need. But the temperatures are probably too lot for this plant that enjoys the cooler side of life. Also, water management can be a challenge. The “hydra” in hydrangea means they need to be watered consistently. They have a very large leaf surface area which results in higher water loss. In addition, hydrangeas lack the ability to regulate water loss under drought stress conditions. This can readily lead to wilting and the resulting leaf scorch.