Hydrangeas come in many different colours including blue, purple, pink, red and white. They are the only flowers that can change colour whilst they are still in bloom. In this post I will show you how to make hydrangeas blue using vinegar. The flowers of hydrangeas will change colour depending on the pH level of the soil they are in. If a hydrangea is growing in alkaline soil, it will have pink flowers but if the soil is acidic, the flowers will be blue. This post is all about hydrangea…
