How do you get Hydrangeas to be vibrant and unique in color?
As others have said you can change the color of some hydrangeas by changing the pH of the soil it grows in. However, some hydrangeas will not change color. The color is a bit like litmus paper — in acid soils they tend to be pinker and in alkaline soils they tend to be bluer. White hydrangeas, which you have, will stay white whatever you do to the soil. There is no pigment to be affected by the pH. It really depends on the hydrangea variety. And sometimes growers will graft two different colored plants together or grow two different plants close together so it looks as if one plant has two different colors of flowers.
