Do Hydrangeas like a lot of water?

Hydrangeas are a popular flowering plant that can be grown in USDA climate zones 5 through 9. In general, hydrangeas like a lot of water.

Water Requirements: Although hydrangeas require a lot of water, they will not flourish in soggy conditions. Consequently, make sure your soil is well-drained. Planting in clay soils is not recommended.

Sun and Shade Requirements: Hydrangeas will thrive in full sun to partial shade conditions. In particular, they are prized as one of the few plants that will produce showy blooms in shady conditions.

Soil Type Requirements: Hydrangeas require fertile, organic soil. Amending with compost is recommended. The plant will tolerate soil pH between 5.0 and 6.5. The color of flower blooms will vary with soil pH. Alkaline soil produces blue flowers while acidic soil produces pink flowers.

References:
"Landscape Plants for Subtropical Climates;" Bijan Dehgan; 1998.