Hydrangeas? They need a lot of water ...
Actually, almost any location is right for a hydrangea.
However, since it needs a lot of water, a wind-protected
spot in partial shade is best. Also ideal is a fresh,
well-drained and nutritious soil that is slightly acidic to neutral.
Speaking of water, provide sufficient moisture, especially in
dry and warm weather, but at the same time make sure that there
is no waterlogging. If the heat is persistent, hydrangeas
should be watered in the morning and evening, because they
evaporate a lot of water through their many large leaves.