Q: Is it true you can change the color of hydrangeas' flowers? I have a pink one in a large patio pot, but I am interested in turning it blue – how can I do so?
A: Changing pink flowers to blue and vice versa is indeed possible with some varieties of hydrangeas: Hydrangea macrophylla and Hydrangea serrata. This seemingly magical transformation is all down to the type of soil plants are growing in, and it can be controlled by green-fingered enthusiasts with a bit of know-how and patience.
