|Hydrangeas, Canon S120|
The local landscape here in France is quite chalky and alkaline. The local hydrangeas in the area all demonstrate just quite how alkaline the soil is; they all grow with varying shades and intensities of pink.
They seem to rather like the climate with the bushes being covered by massive large pink flower heads.
A dash of vinegar may be what is called for to dampen the pinks to a powder blue.