"To join our top selling red Hydrangea we would like to introduce you to our new blue lacecap variety, Blue Wave. You will enjoy an abundance of striking blooms from this easy to grow Hydrangea. Buy also as a part of the mixed Hydrangea collection. Hydrangeas are fascinating in that, unlike most other plants, the colour of their flowers can change dramatically. Changing a hydrangea from pink to blue entails adding aluminum to the soil. To ensure that aluminum is present, aluminum sulfate may be added to th